321420310431091 has 2 divisors, whose sum is σ = 321420310431092. Its totient is φ = 321420310431090.

The previous prime is 321420310430993. The next prime is 321420310431097. The reversal of 321420310431091 is 190134013024123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321420310431091 - 2⁹ = 321420310430579 is a prime.

It is a super-2 number, since 2×321420310431091² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (321420310431097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160710155215545 + 160710155215546.

It is an arithmetic number, because the mean of its divisors is an integer number (160710155215546).

Almost surely, 2^{321420310431091} is an apocalyptic number.

321420310431091 is a deficient number, since it is larger than the sum of its proper divisors (1).

321420310431091 is an equidigital number, since it uses as much as digits as its factorization.

321420310431091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 321420310431091 in words is "three hundred twenty-one trillion, four hundred twenty billion, three hundred ten million, four hundred thirty-one thousand, ninety-one".