21010133120031 has 24 divisors (see below), whose sum is σ = 34546305845376. Its totient is φ = 12179787314640.

The previous prime is 21010133120021. The next prime is 21010133120047. The reversal of 21010133120031 is 13002133101012.

21010133120031 is a `hidden beast` number, since 2 + 1 + 0 + 101 + 331 + 200 + 31 = 666.

It is not a de Polignac number, because 21010133120031 - 2⁶ = 21010133119967 is a prime.

It is a super-2 number, since 2×21010133120031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21010133119986 and 21010133120013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010133120021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4613553525 + ... + 4613558078.

It is an arithmetic number, because the mean of its divisors is an integer number (1439429410224).

Almost surely, 2^{21010133120031} is an apocalyptic number.

21010133120031 is a deficient number, since it is larger than the sum of its proper divisors (13536172725345).

21010133120031 is a wasteful number, since it uses less digits than its factorization.

21010133120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9227111643 (or 9227111640 counting only the distinct ones).

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

Adding to 21010133120031 its reverse (13002133101012), we get a palindrome (34012266221043).

The spelling of 21010133120031 in words is "twenty-one trillion, ten billion, one hundred thirty-three million, one hundred twenty thousand, thirty-one".