121210112122200 has 288 divisors, whose sum is σ = 407595461841360. Its totient is φ = 32280510873600.

The previous prime is 121210112122181. The next prime is 121210112122279. The reversal of 121210112122200 is 2221211012121.

121210112122200 is a `hidden beast` number, since 1 + 21 + 210 + 1 + 1 + 212 + 220 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 10433850792 + ... + 10433862408.

Almost surely, 2^{121210112122200} is an apocalyptic number.

121210112122200 is a gapful number since it is divisible by the number (10) 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 121210112122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203797730920680).

121210112122200 is an abundant number, since it is smaller than the sum of its proper divisors (286385349719160).

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

121210112122200 is a wasteful number, since it uses less digits than its factorization.

121210112122200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18707 (or 18695 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121210112122200 its reverse (2221211012121), we get a palindrome (123431323134321).

The spelling of 121210112122200 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred twenty-two thousand, two hundred".