21023323331131 has 24 divisors (see below), whose sum is σ = 23128684527312. Its totient is φ = 19095242284800.

The previous prime is 21023323331077. The next prime is 21023323331137. The reversal of 21023323331131 is 13113332332012.

It is a happy number.

It is not a de Polignac number, because 21023323331131 - 2³⁵ = 20988963592763 is a prime.

It is a super-2 number, since 2×21023323331131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21023323331131.

It is not an unprimeable number, because it can be changed into a prime (21023323331137) 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, 1576309095 + ... + 1576322431.

It is an arithmetic number, because the mean of its divisors is an integer number (963695188638).

Almost surely, 2^{21023323331131} is an apocalyptic number.

21023323331131 is a deficient number, since it is larger than the sum of its proper divisors (2105361196181).

21023323331131 is a wasteful number, since it uses less digits than its factorization.

21023323331131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23883 (or 23872 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 21023323331131 its reverse (13113332332012), we get a palindrome (34136655663143).

It can be divided in two parts, 2102 and 3323331131, that added together give a palindrome (3323333233).

The spelling of 21023323331131 in words is "twenty-one trillion, twenty-three billion, three hundred twenty-three million, three hundred thirty-one thousand, one hundred thirty-one".