20220131231 has 2 divisors, whose sum is σ = 20220131232. Its totient is φ = 20220131230.

The previous prime is 20220131213. The next prime is 20220131317. The reversal of 20220131231 is 13213102202.

Together with previous prime (20220131213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20220131231 - 2¹⁰ = 20220130207 is a prime.

It is a super-2 number, since 2×20220131231² (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 (20220131131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110065615 + 10110065616.

It is an arithmetic number, because the mean of its divisors is an integer number (10110065616).

Almost surely, 2^20220131231 is an apocalyptic number.

20220131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220131231 is an equidigital number, since it uses as much as digits as its factorization.

20220131231 is an evil number, because the sum of its binary digits is even.

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

Adding to 20220131231 its reverse (13213102202), we get a palindrome (33433233433).

The spelling of 20220131231 in words is "twenty billion, two hundred twenty million, one hundred thirty-one thousand, two hundred thirty-one".