2116565155201 has 12 divisors (see below), whose sum is σ = 2462160810900. Its totient is φ = 1814173653600.

The previous prime is 2116565155189. The next prime is 2116565155217. The reversal of 2116565155201 is 1025515656112.

It can be written as a sum of positive squares in 2 ways, for example, as 589326440976 + 1527238714225 = 767676^2 + 1235815^2 .

It is not a de Polignac number, because 2116565155201 - 2³³ = 2107975220609 is a prime.

It is a super-2 number, since 2×2116565155201² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2116565153201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3877051 + ... + 4389151.

It is an arithmetic number, because the mean of its divisors is an integer number (205180067575).

Almost surely, 2^{2116565155201} is an apocalyptic number.

It is an amenable number.

2116565155201 is a deficient number, since it is larger than the sum of its proper divisors (345595655699).

2116565155201 is an equidigital number, since it uses as much as digits as its factorization.

2116565155201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596464 (or 596457 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 40.

The spelling of 2116565155201 in words is "two trillion, one hundred sixteen billion, five hundred sixty-five million, one hundred fifty-five thousand, two hundred one".