21322310031 has 24 divisors (see below), whose sum is σ = 33793031376. Its totient is φ = 12847904640.

The previous prime is 21322310029. The next prime is 21322310033. The reversal of 21322310031 is 13001322312.

21322310031 is a `hidden beast` number, since 2 + 1 + 322 + 310 + 0 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (21322310029) and next prime (21322310033).

It is not a de Polignac number, because 21322310031 - 2¹ = 21322310029 is a prime.

It is a super-2 number, since 2×21322310031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21322309986 and 21322310013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322310033) 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, 605350 + ... + 639603.

It is an arithmetic number, because the mean of its divisors is an integer number (1408042974).

Almost surely, 2^21322310031 is an apocalyptic number.

21322310031 is a deficient number, since it is larger than the sum of its proper divisors (12470721345).

21322310031 is a wasteful number, since it uses less digits than its factorization.

21322310031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245143 (or 1245140 counting only the distinct ones).

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

Adding to 21322310031 its reverse (13001322312), we get a palindrome (34323632343).

The spelling of 21322310031 in words is "twenty-one billion, three hundred twenty-two million, three hundred ten thousand, thirty-one".