91211011201 has 4 divisors (see below), whose sum is σ = 93332197552. Its totient is φ = 89089824852.

The previous prime is 91211011147. The next prime is 91211011231. The reversal of 91211011201 is 10211011219.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91211011201 - 2¹⁷ = 91210880129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91211011231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060593111 + ... + 1060593196.

It is an arithmetic number, because the mean of its divisors is an integer number (23333049388).

Almost surely, 2^91211011201 is an apocalyptic number.

It is an amenable number.

91211011201 is a deficient number, since it is larger than the sum of its proper divisors (2121186351).

91211011201 is a wasteful number, since it uses less digits than its factorization.

91211011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2121186350.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 91211011201 in words is "ninety-one billion, two hundred eleven million, eleven thousand, two hundred one".