791212220122121 has 16 divisors (see below), whose sum is σ = 919286314936704. Its totient is φ = 666933208406784.

The previous prime is 791212220122109. The next prime is 791212220122123. The reversal of 791212220122121 is 121221022212197.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-791212220122121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (791212220122123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1422166790 + ... + 1422723023.

It is an arithmetic number, because the mean of its divisors is an integer number (57455394683544).

Almost surely, 2^{791212220122121} is an apocalyptic number.

It is an amenable number.

791212220122121 is a deficient number, since it is larger than the sum of its proper divisors (128074094814583).

791212220122121 is a wasteful number, since it uses less digits than its factorization.

791212220122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2844890480.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 791212220122121 in words is "seven hundred ninety-one trillion, two hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".