211101200020091 has 2 divisors, whose sum is σ = 211101200020092. Its totient is φ = 211101200020090.

The previous prime is 211101200020043. The next prime is 211101200020103. The reversal of 211101200020091 is 190020002101112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211101200020091 - 2²² = 211101195825787 is a prime.

It is not a weakly prime, because it can be changed into another prime (211101200020891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105550600010045 + 105550600010046.

It is an arithmetic number, because the mean of its divisors is an integer number (105550600010046).

Almost surely, 2^{211101200020091} is an apocalyptic number.

211101200020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

211101200020091 is an equidigital number, since it uses as much as digits as its factorization.

211101200020091 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.

The spelling of 211101200020091 in words is "two hundred eleven trillion, one hundred one billion, two hundred million, twenty thousand, ninety-one".