20131231124124 has 72 divisors (see below), whose sum is σ = 51226518404880. Its totient is φ = 6665759654400.

The previous prime is 20131231124117. The next prime is 20131231124167. The reversal of 20131231124124 is 42142113213102.

20131231124124 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 1 + 231 + 12 + 412 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3987187 + ... + 7494005.

It is an arithmetic number, because the mean of its divisors is an integer number (711479422290).

Almost surely, 2^{20131231124124} is an apocalyptic number.

It is an amenable number.

20131231124124 is an abundant number, since it is smaller than the sum of its proper divisors (31095287280756).

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

20131231124124 is a wasteful number, since it uses less digits than its factorization.

20131231124124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3507891 (or 3507886 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 20131231124124 its reverse (42142113213102), we get a palindrome (62273344337226).

The spelling of 20131231124124 in words is "twenty trillion, one hundred thirty-one billion, two hundred thirty-one million, one hundred twenty-four thousand, one hundred twenty-four".