110020211211991 has 2 divisors, whose sum is σ = 110020211211992. Its totient is φ = 110020211211990.

The previous prime is 110020211211983. The next prime is 110020211212013. The reversal of 110020211211991 is 199112112020011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 110020211211991 - 2³ = 110020211211983 is a prime.

It is a super-2 number, since 2×110020211211991² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110020211211091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55010105605995 + 55010105605996.

It is an arithmetic number, because the mean of its divisors is an integer number (55010105605996).

Almost surely, 2^{110020211211991} is an apocalyptic number.

110020211211991 is a deficient number, since it is larger than the sum of its proper divisors (1).

110020211211991 is an equidigital number, since it uses as much as digits as its factorization.

110020211211991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 31.

The spelling of 110020211211991 in words is "one hundred ten trillion, twenty billion, two hundred eleven million, two hundred eleven thousand, nine hundred ninety-one".