123231200520 has 32 divisors (see below), whose sum is σ = 369693601920. Its totient is φ = 32861653440.

The previous prime is 123231200471. The next prime is 123231200579. The reversal of 123231200520 is 25002132321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513463216 + ... + 513463455.

It is an arithmetic number, because the mean of its divisors is an integer number (11552925060).

Almost surely, 2^123231200520 is an apocalyptic number.

123231200520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123231200520 is an abundant number, since it is smaller than the sum of its proper divisors (246462401400).

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

123231200520 is a wasteful number, since it uses less digits than its factorization.

123231200520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026926685 (or 1026926681 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 123231200520 its reverse (25002132321), we get a palindrome (148233332841).

The spelling of 123231200520 in words is "one hundred twenty-three billion, two hundred thirty-one million, two hundred thousand, five hundred twenty".