10203121112112 has 120 divisors (see below), whose sum is σ = 28819079627520. Its totient is φ = 3369635821440.

The previous prime is 10203121112081. The next prime is 10203121112143. The reversal of 10203121112112 is 21121112130201.

It is a happy number.

10203121112112 is a `hidden beast` number, since 10 + 20 + 312 + 111 + 211 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (10203121112081) and next prime (10203121112143).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9224437 + ... + 10271147.

It is an arithmetic number, because the mean of its divisors is an integer number (240158996896).

Almost surely, 2^{10203121112112} is an apocalyptic number.

10203121112112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10203121112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14409539813760).

10203121112112 is an abundant number, since it is smaller than the sum of its proper divisors (18615958515408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10203121112112 is a wasteful number, since it uses less digits than its factorization.

10203121112112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047351 (or 1047342 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 10203121112112 its reverse (21121112130201), we get a palindrome (31324233242313).

The spelling of 10203121112112 in words is "ten trillion, two hundred three billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twelve".