2111210211091 has 2 divisors, whose sum is σ = 2111210211092. Its totient is φ = 2111210211090.

The previous prime is 2111210211083. The next prime is 2111210211163. The reversal of 2111210211091 is 1901120121112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111210211091 - 2³ = 2111210211083 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111210211001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055605105545 + 1055605105546.

It is an arithmetic number, because the mean of its divisors is an integer number (1055605105546).

Almost surely, 2^{2111210211091} is an apocalyptic number.

2111210211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111210211091 is an equidigital number, since it uses as much as digits as its factorization.

2111210211091 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 22.

The spelling of 2111210211091 in words is "two trillion, one hundred eleven billion, two hundred ten million, two hundred eleven thousand, ninety-one".