20031131010123 has 12 divisors (see below), whose sum is σ = 29232143079048. Its totient is φ = 13216416336000.

The previous prime is 20031131010053. The next prime is 20031131010127. The reversal of 20031131010123 is 32101013113002.

20031131010123 is a `hidden beast` number, since 20 + 0 + 311 + 310 + 1 + 0 + 1 + 23 = 666.

It is not a de Polignac number, because 20031131010123 - 2¹² = 20031131006027 is a prime.

It is a super-2 number, since 2×20031131010123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20031131010096 and 20031131010105.

It is not an unprimeable number, because it can be changed into a prime (20031131010127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11472582753 + ... + 11472584498.

It is an arithmetic number, because the mean of its divisors is an integer number (2436011923254).

Almost surely, 2^{20031131010123} is an apocalyptic number.

20031131010123 is a deficient number, since it is larger than the sum of its proper divisors (9201012068925).

20031131010123 is a wasteful number, since it uses less digits than its factorization.

20031131010123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22945167354 (or 22945167351 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20031131010123 its reverse (32101013113002), we get a palindrome (52132144123125).

The spelling of 20031131010123 in words is "twenty trillion, thirty-one billion, one hundred thirty-one million, ten thousand, one hundred twenty-three".