2100121110979 has 2 divisors, whose sum is σ = 2100121110980. Its totient is φ = 2100121110978.

The previous prime is 2100121110977. The next prime is 2100121111037. The reversal of 2100121110979 is 9790111210012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100121110979 - 2¹ = 2100121110977 is a prime.

Together with 2100121110977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2100121110977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050060555489 + 1050060555490.

It is an arithmetic number, because the mean of its divisors is an integer number (1050060555490).

Almost surely, 2^{2100121110979} is an apocalyptic number.

2100121110979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100121110979 is an equidigital number, since it uses as much as digits as its factorization.

2100121110979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 2100121110979 in words is "two trillion, one hundred billion, one hundred twenty-one million, one hundred ten thousand, nine hundred seventy-nine".