116857815121 has 2 divisors, whose sum is σ = 116857815122. Its totient is φ = 116857815120.

The previous prime is 116857815119. The next prime is 116857815169. The reversal of 116857815121 is 121518758611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109455105600 + 7402709521 = 330840^2 + 86039^2 .

It is an emirp because it is prime and its reverse (121518758611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116857815121 - 2¹ = 116857815119 is a prime.

Together with 116857815119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (116857815181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58428907560 + 58428907561.

It is an arithmetic number, because the mean of its divisors is an integer number (58428907561).

Almost surely, 2^116857815121 is an apocalyptic number.

It is an amenable number.

116857815121 is a deficient number, since it is larger than the sum of its proper divisors (1).

116857815121 is an equidigital number, since it uses as much as digits as its factorization.

116857815121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 46.

The spelling of 116857815121 in words is "one hundred sixteen billion, eight hundred fifty-seven million, eight hundred fifteen thousand, one hundred twenty-one".