123521255112 has 32 divisors (see below), whose sum is σ = 310266672480. Its totient is φ = 40978613760.

The previous prime is 123521255101. The next prime is 123521255113. The reversal of 123521255112 is 211552125321.

It is a super-2 number, since 2×123521255112² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123521255112.

It is not an unprimeable number, because it can be changed into a prime (123521255113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12190953 + ... + 12201080.

It is an arithmetic number, because the mean of its divisors is an integer number (9695833515).

Almost surely, 2^123521255112 is an apocalyptic number.

123521255112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123521255112 is an abundant number, since it is smaller than the sum of its proper divisors (186745417368).

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

123521255112 is a wasteful number, since it uses less digits than its factorization.

123521255112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24392253 (or 24392249 counting only the distinct ones).

The product of its digits is 6000, while the sum is 30.

The spelling of 123521255112 in words is "one hundred twenty-three billion, five hundred twenty-one million, two hundred fifty-five thousand, one hundred twelve".