21002023210131 has 24 divisors (see below), whose sum is σ = 30343646721024. Its totient is φ = 13997938097520.

The previous prime is 21002023210123. The next prime is 21002023210159. The reversal of 21002023210131 is 13101232020012.

21002023210131 is a `hidden beast` number, since 2 + 10 + 0 + 202 + 321 + 0 + 131 = 666.

It is not a de Polignac number, because 21002023210131 - 2³ = 21002023210123 is a prime.

It is a super-2 number, since 2×21002023210131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002023710131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1124837926 + ... + 1124856596.

It is an arithmetic number, because the mean of its divisors is an integer number (1264318613376).

Almost surely, 2^{21002023210131} is an apocalyptic number.

21002023210131 is a deficient number, since it is larger than the sum of its proper divisors (9341623510893).

21002023210131 is a wasteful number, since it uses less digits than its factorization.

21002023210131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42431 (or 42428 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21002023210131 its reverse (13101232020012), we get a palindrome (34103255230143).

The spelling of 21002023210131 in words is "twenty-one trillion, two billion, twenty-three million, two hundred ten thousand, one hundred thirty-one".