3121133452991 has 2 divisors, whose sum is σ = 3121133452992. Its totient is φ = 3121133452990.

The previous prime is 3121133452981. The next prime is 3121133453057. The reversal of 3121133452991 is 1992543311213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121133452991 - 2³⁸ = 2846255546047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121133452981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560566726495 + 1560566726496.

It is an arithmetic number, because the mean of its divisors is an integer number (1560566726496).

Almost surely, 2^{3121133452991} is an apocalyptic number.

3121133452991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121133452991 is an equidigital number, since it uses as much as digits as its factorization.

3121133452991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The spelling of 3121133452991 in words is "three trillion, one hundred twenty-one billion, one hundred thirty-three million, four hundred fifty-two thousand, nine hundred ninety-one".