2111021022091 has 2 divisors, whose sum is σ = 2111021022092. Its totient is φ = 2111021022090.

The previous prime is 2111021022053. The next prime is 2111021022107. The reversal of 2111021022091 is 1902201201112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111021022091 - 2²⁷ = 2110886804363 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111021023091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055510511045 + 1055510511046.

It is an arithmetic number, because the mean of its divisors is an integer number (1055510511046).

Almost surely, 2^{2111021022091} is an apocalyptic number.

2111021022091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111021022091 is an equidigital number, since it uses as much as digits as its factorization.

2111021022091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 2111021022091 in words is "two trillion, one hundred eleven billion, twenty-one million, twenty-two thousand, ninety-one".