211121101091 has 2 divisors, whose sum is σ = 211121101092. Its totient is φ = 211121101090.

The previous prime is 211121101039. The next prime is 211121101097. The reversal of 211121101091 is 190101121112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211121101091 - 2¹⁸ = 211120838947 is a prime.

It is not a weakly prime, because it can be changed into another prime (211121101097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560550545 + 105560550546.

It is an arithmetic number, because the mean of its divisors is an integer number (105560550546).

Almost surely, 2^211121101091 is an apocalyptic number.

211121101091 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121101091 is an equidigital number, since it uses as much as digits as its factorization.

211121101091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 20.

The spelling of 211121101091 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred one thousand, ninety-one".