115151056651021 has 2 divisors, whose sum is σ = 115151056651022. Its totient is φ = 115151056651020.

The previous prime is 115151056650997. The next prime is 115151056651051. The reversal of 115151056651021 is 120156650151511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67876342464100 + 47274714186921 = 8238710^2 + 6875661^2 .

It is an emirp because it is prime and its reverse (120156650151511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115151056651021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115151056651051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57575528325510 + 57575528325511.

It is an arithmetic number, because the mean of its divisors is an integer number (57575528325511).

Almost surely, 2^{115151056651021} is an apocalyptic number.

It is an amenable number.

115151056651021 is a deficient number, since it is larger than the sum of its proper divisors (1).

115151056651021 is an equidigital number, since it uses as much as digits as its factorization.

115151056651021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45000, while the sum is 40.

The spelling of 115151056651021 in words is "one hundred fifteen trillion, one hundred fifty-one billion, fifty-six million, six hundred fifty-one thousand, twenty-one".