331020013091 has 2 divisors, whose sum is σ = 331020013092. Its totient is φ = 331020013090.

The previous prime is 331020013057. The next prime is 331020013127. The reversal of 331020013091 is 190310020133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331020013091 - 2¹⁴ = 331019996707 is a prime.

It is a super-2 number, since 2×331020013091² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331020013001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165510006545 + 165510006546.

It is an arithmetic number, because the mean of its divisors is an integer number (165510006546).

Almost surely, 2^331020013091 is an apocalyptic number.

331020013091 is a deficient number, since it is larger than the sum of its proper divisors (1).

331020013091 is an equidigital number, since it uses as much as digits as its factorization.

331020013091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 331020013091 in words is "three hundred thirty-one billion, twenty million, thirteen thousand, ninety-one".