116345612521 has 2 divisors, whose sum is σ = 116345612522. Its totient is φ = 116345612520.

The previous prime is 116345612519. The next prime is 116345612533. The reversal of 116345612521 is 125216543611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64941386896 + 51404225625 = 254836^2 + 226725^2 .

It is an emirp because it is prime and its reverse (125216543611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116345612521 - 2¹ = 116345612519 is a prime.

Together with 116345612519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (116345612321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58172806260 + 58172806261.

It is an arithmetic number, because the mean of its divisors is an integer number (58172806261).

Almost surely, 2^116345612521 is an apocalyptic number.

It is an amenable number.

116345612521 is a deficient number, since it is larger than the sum of its proper divisors (1).

116345612521 is an equidigital number, since it uses as much as digits as its factorization.

116345612521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The spelling of 116345612521 in words is "one hundred sixteen billion, three hundred forty-five million, six hundred twelve thousand, five hundred twenty-one".