11116005166621 has 4 divisors (see below), whose sum is σ = 11272568619744. Its totient is φ = 10959441713500.

The previous prime is 11116005166597. The next prime is 11116005166639. The reversal of 11116005166621 is 12666150061111.

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 not a de Polignac number, because 11116005166621 - 2²³ = 11115996778013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11116005166121) 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, 78281726455 + ... + 78281726596.

It is an arithmetic number, because the mean of its divisors is an integer number (2818142154936).

Almost surely, 2^{11116005166621} is an apocalyptic number.

It is an amenable number.

11116005166621 is a deficient number, since it is larger than the sum of its proper divisors (156563453123).

11116005166621 is an equidigital number, since it uses as much as digits as its factorization.

11116005166621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156563453122.

The product of its (nonzero) digits is 12960, while the sum is 37.

The spelling of 11116005166621 in words is "eleven trillion, one hundred sixteen billion, five million, one hundred sixty-six thousand, six hundred twenty-one".