20131231124123 has 64 divisors (see below), whose sum is σ = 24932250746880. Its totient is φ = 15867227376000.

The previous prime is 20131231124117. The next prime is 20131231124167. The reversal of 20131231124123 is 32142113213102.

It is not a de Polignac number, because 20131231124123 - 2¹⁰ = 20131231123099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20131231124092 and 20131231124101.

It is not an unprimeable number, because it can be changed into a prime (20131231124723) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6058147940 + ... + 6058151262.

It is an arithmetic number, because the mean of its divisors is an integer number (389566417920).

Almost surely, 2^{20131231124123} is an apocalyptic number.

20131231124123 is a deficient number, since it is larger than the sum of its proper divisors (4801019622757).

20131231124123 is a wasteful number, since it uses less digits than its factorization.

20131231124123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 20131231124123 its reverse (32142113213102), we get a palindrome (52273344337225).

The spelling of 20131231124123 in words is "twenty trillion, one hundred thirty-one billion, two hundred thirty-one million, one hundred twenty-four thousand, one hundred twenty-three".