23021212131 has 12 divisors (see below), whose sum is σ = 33262411000. Its totient is φ = 15343067520.

The previous prime is 23021212103. The next prime is 23021212147. The reversal of 23021212131 is 13121212032.

It is not a de Polignac number, because 23021212131 - 2¹¹ = 23021210083 is a prime.

It is a super-2 number, since 2×23021212131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23021212531) 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 11 ways as a sum of consecutive naturals, for example, 334030 + ... + 397011.

Almost surely, 2^23021212131 is an apocalyptic number.

23021212131 is a deficient number, since it is larger than the sum of its proper divisors (10241198869).

23021212131 is a wasteful number, since it uses less digits than its factorization.

23021212131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734546 (or 734543 counting only the distinct ones).

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

Adding to 23021212131 its reverse (13121212032), we get a palindrome (36142424163).

Subtracting from 23021212131 its reverse (13121212032), we obtain a palindrome (9900000099).

The spelling of 23021212131 in words is "twenty-three billion, twenty-one million, two hundred twelve thousand, one hundred thirty-one".