115211570666121 has 12 divisors (see below), whose sum is σ = 166416889191748. Its totient is φ = 76807632543264.

The previous prime is 115211570666117. The next prime is 115211570666123. The reversal of 115211570666121 is 121666075112511.

It can be written as a sum of positive squares in 2 ways, for example, as 95282587238400 + 19928983427721 = 9761280^2 + 4464189^2 .

It is not a de Polignac number, because 115211570666121 - 2² = 115211570666117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115211570666123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2946831 + ... + 15463083.

Almost surely, 2^{115211570666121} is an apocalyptic number.

It is an amenable number.

115211570666121 is a deficient number, since it is larger than the sum of its proper divisors (51205318525627).

115211570666121 is a wasteful number, since it uses less digits than its factorization.

115211570666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13539032 (or 13539029 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 45.

The spelling of 115211570666121 in words is "one hundred fifteen trillion, two hundred eleven billion, five hundred seventy million, six hundred sixty-six thousand, one hundred twenty-one".