3121001322991 has 2 divisors, whose sum is σ = 3121001322992. Its totient is φ = 3121001322990.

The previous prime is 3121001322979. The next prime is 3121001323001. The reversal of 3121001322991 is 1992231001213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121001322991 - 2²³ = 3120992934383 is a prime.

It is a super-2 number, since 2×3121001322991² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121001320991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560500661495 + 1560500661496.

It is an arithmetic number, because the mean of its divisors is an integer number (1560500661496).

Almost surely, 2^{3121001322991} is an apocalyptic number.

3121001322991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121001322991 is an equidigital number, since it uses as much as digits as its factorization.

3121001322991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 3121001322991 in words is "three trillion, one hundred twenty-one billion, one million, three hundred twenty-two thousand, nine hundred ninety-one".