2121011100931 has 2 divisors, whose sum is σ = 2121011100932. Its totient is φ = 2121011100930.

The previous prime is 2121011100889. The next prime is 2121011101021. The reversal of 2121011100931 is 1390011101212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121011100931 is a prime.

It is a super-2 number, since 2×2121011100931² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2121011104931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060505550465 + 1060505550466.

It is an arithmetic number, because the mean of its divisors is an integer number (1060505550466).

Almost surely, 2^{2121011100931} is an apocalyptic number.

2121011100931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121011100931 is an equidigital number, since it uses as much as digits as its factorization.

2121011100931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 2121011100931 in words is "two trillion, one hundred twenty-one billion, eleven million, one hundred thousand, nine hundred thirty-one".