116721651121 has 2 divisors, whose sum is σ = 116721651122. Its totient is φ = 116721651120.

The previous prime is 116721651049. The next prime is 116721651133. The reversal of 116721651121 is 121156127611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86562466225 + 30159184896 = 294215^2 + 173664^2 .

It is a cyclic number.

It is not a de Polignac number, because 116721651121 - 2¹⁵ = 116721618353 is a prime.

It is not a weakly prime, because it can be changed into another prime (116721651161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58360825560 + 58360825561.

It is an arithmetic number, because the mean of its divisors is an integer number (58360825561).

Almost surely, 2^116721651121 is an apocalyptic number.

It is an amenable number.

116721651121 is a deficient number, since it is larger than the sum of its proper divisors (1).

116721651121 is an equidigital number, since it uses as much as digits as its factorization.

116721651121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 34.

Adding to 116721651121 its reverse (121156127611), we get a palindrome (237877778732).

The spelling of 116721651121 in words is "one hundred sixteen billion, seven hundred twenty-one million, six hundred fifty-one thousand, one hundred twenty-one".