321020223131 has 2 divisors, whose sum is σ = 321020223132. Its totient is φ = 321020223130.

The previous prime is 321020223091. The next prime is 321020223187. The reversal of 321020223131 is 131322020123.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 321020223131 - 2⁶ = 321020223067 is a prime.

It is a super-2 number, since 2×321020223131² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (321020225131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160510111565 + 160510111566.

It is an arithmetic number, because the mean of its divisors is an integer number (160510111566).

Almost surely, 2^321020223131 is an apocalyptic number.

321020223131 is a deficient number, since it is larger than the sum of its proper divisors (1).

321020223131 is an equidigital number, since it uses as much as digits as its factorization.

321020223131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 321020223131 its reverse (131322020123), we get a palindrome (452342243254).

The spelling of 321020223131 in words is "three hundred twenty-one billion, twenty million, two hundred twenty-three thousand, one hundred thirty-one".