22221223231 has 2 divisors, whose sum is σ = 22221223232. Its totient is φ = 22221223230.

The previous prime is 22221223229. The next prime is 22221223247. The reversal of 22221223231 is 13232212222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22221223231 - 2¹ = 22221223229 is a prime.

It is a super-2 number, since 2×22221223231² (a number of 21 digits) contains 22 as substring.

Together with 22221223229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221223831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110611615 + 11110611616.

It is an arithmetic number, because the mean of its divisors is an integer number (11110611616).

Almost surely, 2^22221223231 is an apocalyptic number.

22221223231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221223231 is an equidigital number, since it uses as much as digits as its factorization.

22221223231 is an evil number, because the sum of its binary digits is even.

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

Adding to 22221223231 its reverse (13232212222), we get a palindrome (35453435453).

The spelling of 22221223231 in words is "twenty-two billion, two hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-one".