22391299566721 has 4 divisors (see below), whose sum is σ = 22562225517744. Its totient is φ = 22220373615700.

The previous prime is 22391299566707. The next prime is 22391299566781. The reversal of 22391299566721 is 12766599219322.

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 a de Polignac number, because none of the positive numbers 2^k-22391299566721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22391299566781) 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, 85462975315 + ... + 85462975576.

It is an arithmetic number, because the mean of its divisors is an integer number (5640556379436).

Almost surely, 2^{22391299566721} is an apocalyptic number.

It is an amenable number.

22391299566721 is a deficient number, since it is larger than the sum of its proper divisors (170925951023).

22391299566721 is a wasteful number, since it uses less digits than its factorization.

22391299566721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170925951022.

The product of its digits is 44089920, while the sum is 64.

The spelling of 22391299566721 in words is "twenty-two trillion, three hundred ninety-one billion, two hundred ninety-nine million, five hundred sixty-six thousand, seven hundred twenty-one".