2391200820081 has 24 divisors (see below), whose sum is σ = 3665215719360. Its totient is φ = 1498979234016.

The previous prime is 2391200819881. The next prime is 2391200820091. The reversal of 2391200820081 is 1800280021932.

It is not a de Polignac number, because 2391200820081 - 2²⁵ = 2391167265649 is a prime.

It is a super-2 number, since 2×2391200820081² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2391200820091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97883506 + ... + 97907931.

It is an arithmetic number, because the mean of its divisors is an integer number (152717321640).

Almost surely, 2^{2391200820081} is an apocalyptic number.

It is an amenable number.

2391200820081 is a deficient number, since it is larger than the sum of its proper divisors (1274014899279).

2391200820081 is a wasteful number, since it uses less digits than its factorization.

2391200820081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195791525 (or 195791522 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 2391200820081 in words is "two trillion, three hundred ninety-one billion, two hundred million, eight hundred twenty thousand, eighty-one".