12001002221091 has 16 divisors (see below), whose sum is σ = 18245867631264. Its totient is φ = 6950806715904.

The previous prime is 12001002221081. The next prime is 12001002221107. The reversal of 12001002221091 is 19012220010021.

It is not a de Polignac number, because 12001002221091 - 2⁵ = 12001002221059 is a prime.

It is a super-2 number, since 2×12001002221091² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12001002221041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9050528916 + ... + 9050530241.

It is an arithmetic number, because the mean of its divisors is an integer number (1140366726954).

Almost surely, 2^{12001002221091} is an apocalyptic number.

12001002221091 is a deficient number, since it is larger than the sum of its proper divisors (6244865410173).

12001002221091 is a wasteful number, since it uses less digits than its factorization.

12001002221091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18101059190.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 12001002221091 in words is "twelve trillion, one billion, two million, two hundred twenty-one thousand, ninety-one".