116551312121 has 2 divisors, whose sum is σ = 116551312122. Its totient is φ = 116551312120.

The previous prime is 116551312117. The next prime is 116551312159. The reversal of 116551312121 is 121213155611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101289427600 + 15261884521 = 318260^2 + 123539^2 .

It is a cyclic number.

It is not a de Polignac number, because 116551312121 - 2² = 116551312117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (116551312181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58275656060 + 58275656061.

It is an arithmetic number, because the mean of its divisors is an integer number (58275656061).

Almost surely, 2^116551312121 is an apocalyptic number.

It is an amenable number.

116551312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

116551312121 is an equidigital number, since it uses as much as digits as its factorization.

116551312121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 29.

Adding to 116551312121 its reverse (121213155611), we get a palindrome (237764467732).

The spelling of 116551312121 in words is "one hundred sixteen billion, five hundred fifty-one million, three hundred twelve thousand, one hundred twenty-one".