22012311031 has 4 divisors (see below), whose sum is σ = 22218033672. Its totient is φ = 21806588392.

The previous prime is 22012310909. The next prime is 22012311043. The reversal of 22012311031 is 13011321022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22012311031 - 2⁹ = 22012310519 is a prime.

It is a super-2 number, since 2×22012311031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012310996 and 22012311014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012311131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102861160 + ... + 102861373.

It is an arithmetic number, because the mean of its divisors is an integer number (5554508418).

Almost surely, 2^22012311031 is an apocalyptic number.

22012311031 is a deficient number, since it is larger than the sum of its proper divisors (205722641).

22012311031 is a wasteful number, since it uses less digits than its factorization.

22012311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205722640.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 22012311031 its reverse (13011321022), we get a palindrome (35023632053).

Subtracting from 22012311031 its reverse (13011321022), we obtain a palindrome (9000990009).

The spelling of 22012311031 in words is "twenty-two billion, twelve million, three hundred eleven thousand, thirty-one".