201101122091 has 2 divisors, whose sum is σ = 201101122092. Its totient is φ = 201101122090.

The previous prime is 201101122069. The next prime is 201101122093. The reversal of 201101122091 is 190221101102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201101122091 - 2²⁶ = 201034013227 is a prime.

It is a super-2 number, since 2×201101122091² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 201101122093, 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 (201101122093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100550561045 + 100550561046.

It is an arithmetic number, because the mean of its divisors is an integer number (100550561046).

Almost surely, 2^201101122091 is an apocalyptic number.

201101122091 is a deficient number, since it is larger than the sum of its proper divisors (1).

201101122091 is an equidigital number, since it uses as much as digits as its factorization.

201101122091 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 20.

Adding to 201101122091 its reverse (190221101102), we get a palindrome (391322223193).

The spelling of 201101122091 in words is "two hundred one billion, one hundred one million, one hundred twenty-two thousand, ninety-one".