220020131231 has 2 divisors, whose sum is σ = 220020131232. Its totient is φ = 220020131230.

The previous prime is 220020131173. The next prime is 220020131251. The reversal of 220020131231 is 132131020022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220020131231 - 2²² = 220015936927 is a prime.

It is a super-2 number, since 2×220020131231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220020131251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010065615 + 110010065616.

It is an arithmetic number, because the mean of its divisors is an integer number (110010065616).

Almost surely, 2^220020131231 is an apocalyptic number.

220020131231 is a deficient number, since it is larger than the sum of its proper divisors (1).

220020131231 is an equidigital number, since it uses as much as digits as its factorization.

220020131231 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 220020131231 its reverse (132131020022), we get a palindrome (352151151253).

The spelling of 220020131231 in words is "two hundred twenty billion, twenty million, one hundred thirty-one thousand, two hundred thirty-one".