2102211100091 has 2 divisors, whose sum is σ = 2102211100092. Its totient is φ = 2102211100090.

The previous prime is 2102211100069. The next prime is 2102211100123. The reversal of 2102211100091 is 1900011122012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102211100091 - 2³⁴ = 2085031230907 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102211100061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051105550045 + 1051105550046.

It is an arithmetic number, because the mean of its divisors is an integer number (1051105550046).

Almost surely, 2^{2102211100091} is an apocalyptic number.

2102211100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102211100091 is an equidigital number, since it uses as much as digits as its factorization.

2102211100091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 2102211100091 in words is "two trillion, one hundred two billion, two hundred eleven million, one hundred thousand, ninety-one".