22123222231 has 4 divisors (see below), whose sum is σ = 24134424264. Its totient is φ = 20112020200.

The previous prime is 22123222213. The next prime is 22123222237. The reversal of 22123222231 is 13222232122.

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 22123222231 - 2¹⁹ = 22122697943 is a prime.

It is a super-2 number, since 2×22123222231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123222237) 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, 1005601000 + ... + 1005601021.

It is an arithmetic number, because the mean of its divisors is an integer number (6033606066).

Almost surely, 2^22123222231 is an apocalyptic number.

22123222231 is a deficient number, since it is larger than the sum of its proper divisors (2011202033).

22123222231 is a wasteful number, since it uses less digits than its factorization.

22123222231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011202032.

The product of its digits is 1152, while the sum is 22.

Adding to 22123222231 its reverse (13222232122), we get a palindrome (35345454353).

The spelling of 22123222231 in words is "twenty-two billion, one hundred twenty-three million, two hundred twenty-two thousand, two hundred thirty-one".