3121321131967 has 2 divisors, whose sum is σ = 3121321131968. Its totient is φ = 3121321131966.

The previous prime is 3121321131961. The next prime is 3121321132081. The reversal of 3121321131967 is 7691311231213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121321131967 - 2¹¹ = 3121321129919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121321131961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560660565983 + 1560660565984.

It is an arithmetic number, because the mean of its divisors is an integer number (1560660565984).

Almost surely, 2^{3121321131967} is an apocalyptic number.

3121321131967 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121321131967 is an equidigital number, since it uses as much as digits as its factorization.

3121321131967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 40.

The spelling of 3121321131967 in words is "three trillion, one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, nine hundred sixty-seven".