21232301031 has 12 divisors (see below), whose sum is σ = 31188691560. Its totient is φ = 13914954000.

The previous prime is 21232301023. The next prime is 21232301033. The reversal of 21232301031 is 13010323212.

It is not a de Polignac number, because 21232301031 - 2³ = 21232301023 is a prime.

It is a super-2 number, since 2×21232301031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21232300995 and 21232301013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232301033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19992220 + ... + 19993281.

It is an arithmetic number, because the mean of its divisors is an integer number (2599057630).

Almost surely, 2^21232301031 is an apocalyptic number.

21232301031 is a deficient number, since it is larger than the sum of its proper divisors (9956390529).

21232301031 is a wasteful number, since it uses less digits than its factorization.

21232301031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39985566 (or 39985563 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21232301031 its reverse (13010323212), we get a palindrome (34242624243).

The spelling of 21232301031 in words is "twenty-one billion, two hundred thirty-two million, three hundred one thousand, thirty-one".