799111220081 has 2 divisors, whose sum is σ = 799111220082. Its totient is φ = 799111220080.

The previous prime is 799111220041. The next prime is 799111220119. The reversal of 799111220081 is 180022111997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756971341681 + 42139878400 = 870041^2 + 205280^2 .

It is a cyclic number.

It is not a de Polignac number, because 799111220081 - 2³⁸ = 524233313137 is a prime.

It is a super-2 number, since 2×799111220081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (799111220041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399555610040 + 399555610041.

It is an arithmetic number, because the mean of its divisors is an integer number (399555610041).

Almost surely, 2^799111220081 is an apocalyptic number.

It is an amenable number.

799111220081 is a deficient number, since it is larger than the sum of its proper divisors (1).

799111220081 is an equidigital number, since it uses as much as digits as its factorization.

799111220081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 41.

The spelling of 799111220081 in words is "seven hundred ninety-nine billion, one hundred eleven million, two hundred twenty thousand, eighty-one".