2100212096891 has 2 divisors, whose sum is σ = 2100212096892. Its totient is φ = 2100212096890.

The previous prime is 2100212096813. The next prime is 2100212096897. The reversal of 2100212096891 is 1986902120012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2100212096891 - 2³⁴ = 2083032227707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2100212096897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050106048445 + 1050106048446.

It is an arithmetic number, because the mean of its divisors is an integer number (1050106048446).

Almost surely, 2^{2100212096891} is an apocalyptic number.

2100212096891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100212096891 is an equidigital number, since it uses as much as digits as its factorization.

2100212096891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 2100212096891 in words is "two trillion, one hundred billion, two hundred twelve million, ninety-six thousand, eight hundred ninety-one".