12011020120 has 64 divisors (see below), whose sum is σ = 29662640640. Its totient is φ = 4340822400.

The previous prime is 12011020117. The next prime is 12011020121. The reversal of 12011020120 is 2102011021.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 12011020097 and 12011020106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011020121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12016 + ... + 155455.

It is an arithmetic number, because the mean of its divisors is an integer number (463478760).

Almost surely, 2^12011020120 is an apocalyptic number.

12011020120 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 12011020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14831320320).

12011020120 is an abundant number, since it is smaller than the sum of its proper divisors (17651620520).

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

12011020120 is a wasteful number, since it uses less digits than its factorization.

12011020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167656 (or 167652 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12011020120 its reverse (2102011021), we get a palindrome (14113031141).

Subtracting from 12011020120 its reverse (2102011021), we obtain a palindrome (9909009099).

The spelling of 12011020120 in words is "twelve billion, eleven million, twenty thousand, one hundred twenty".