31331220133023 has 12 divisors (see below), whose sum is σ = 45257901370240. Its totient is φ = 20886698006496.

The previous prime is 31331220133021. The next prime is 31331220133033. The reversal of 31331220133023 is 32033102213313.

31331220133023 is a `hidden beast` number, since 3 + 1 + 331 + 2 + 20 + 1 + 3 + 302 + 3 = 666.

It is not a de Polignac number, because 31331220133023 - 2¹ = 31331220133021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31331220133021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64919743 + ... + 65400576.

Almost surely, 2^{31331220133023} is an apocalyptic number.

31331220133023 is a deficient number, since it is larger than the sum of its proper divisors (13926681237217).

31331220133023 is a wasteful number, since it uses less digits than its factorization.

31331220133023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130347038 (or 130347035 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 31331220133023 its reverse (32033102213313), we get a palindrome (63364322346336).

The spelling of 31331220133023 in words is "thirty-one trillion, three hundred thirty-one billion, two hundred twenty million, one hundred thirty-three thousand, twenty-three".