22231213231 has 2 divisors, whose sum is σ = 22231213232. Its totient is φ = 22231213230.

The previous prime is 22231213217. The next prime is 22231213243. The reversal of 22231213231 is 13231213222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22231213231 - 2¹³ = 22231205039 is a prime.

It is a super-2 number, since 2×22231213231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201213231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115606615 + 11115606616.

It is an arithmetic number, because the mean of its divisors is an integer number (11115606616).

Almost surely, 2^22231213231 is an apocalyptic number.

22231213231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231213231 is an equidigital number, since it uses as much as digits as its factorization.

22231213231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

Adding to 22231213231 its reverse (13231213222), we get a palindrome (35462426453).

Subtracting from 22231213231 its reverse (13231213222), we obtain a palindrome (9000000009).

The spelling of 22231213231 in words is "twenty-two billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-one".