116121611566321 has 4 divisors (see below), whose sum is σ = 122952294599652. Its totient is φ = 109290928532992.

The previous prime is 116121611566231. The next prime is 116121611566333. The reversal of 116121611566321 is 123665116121611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93004132138225 + 23117479428096 = 9643865^2 + 4808064^2 .

It is a cyclic number.

It is not a de Polignac number, because 116121611566321 - 2⁹ = 116121611565809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116121611546321) 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, 3415341516640 + ... + 3415341516673.

It is an arithmetic number, because the mean of its divisors is an integer number (30738073649913).

Almost surely, 2^{116121611566321} is an apocalyptic number.

It is an amenable number.

116121611566321 is a deficient number, since it is larger than the sum of its proper divisors (6830683033331).

116121611566321 is an equidigital number, since it uses as much as digits as its factorization.

116121611566321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6830683033330.

The product of its digits is 77760, while the sum is 43.

Adding to 116121611566321 its reverse (123665116121611), we get a palindrome (239786727687932).

The spelling of 116121611566321 in words is "one hundred sixteen trillion, one hundred twenty-one billion, six hundred eleven million, five hundred sixty-six thousand, three hundred twenty-one".