211120111091 has 2 divisors, whose sum is σ = 211120111092. Its totient is φ = 211120111090.

The previous prime is 211120111009. The next prime is 211120111093. The reversal of 211120111091 is 190111021112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211120111091 is a prime.

Together with 211120111093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (211120111093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560055545 + 105560055546.

It is an arithmetic number, because the mean of its divisors is an integer number (105560055546).

Almost surely, 2^211120111091 is an apocalyptic number.

211120111091 is a deficient number, since it is larger than the sum of its proper divisors (1).

211120111091 is an equidigital number, since it uses as much as digits as its factorization.

211120111091 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 211120111091 in words is "two hundred eleven billion, one hundred twenty million, one hundred eleven thousand, ninety-one".