22031021231 has 2 divisors, whose sum is σ = 22031021232. Its totient is φ = 22031021230.

The previous prime is 22031021209. The next prime is 22031021269. The reversal of 22031021231 is 13212013022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22031021231 - 2⁶ = 22031021167 is a prime.

It is a super-2 number, since 2×22031021231² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22031026231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015510615 + 11015510616.

It is an arithmetic number, because the mean of its divisors is an integer number (11015510616).

Almost surely, 2^22031021231 is an apocalyptic number.

22031021231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031021231 is an equidigital number, since it uses as much as digits as its factorization.

22031021231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22031021231 its reverse (13212013022), we get a palindrome (35243034253).

The spelling of 22031021231 in words is "twenty-two billion, thirty-one million, twenty-one thousand, two hundred thirty-one".