12001001021191 has 32 divisors (see below), whose sum is σ = 14898070978560. Its totient is φ = 9413377255296.

The previous prime is 12001001021179. The next prime is 12001001021227. The reversal of 12001001021191 is 19112010010021.

It is not a de Polignac number, because 12001001021191 - 2¹³ = 12001001012999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001001021111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14850045 + ... + 15637321.

It is an arithmetic number, because the mean of its divisors is an integer number (465564718080).

Almost surely, 2^{12001001021191} is an apocalyptic number.

12001001021191 is a deficient number, since it is larger than the sum of its proper divisors (2897069957369).

12001001021191 is a wasteful number, since it uses less digits than its factorization.

12001001021191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788743.

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

The spelling of 12001001021191 in words is "twelve trillion, one billion, one million, twenty-one thousand, one hundred ninety-one".