215421207126113 has 8 divisors (see below), whose sum is σ = 217851768082440. Its totient is φ = 212990870568960.

The previous prime is 215421207126109. The next prime is 215421207126121. The reversal of 215421207126113 is 311621702124512.

It can be written as a sum of positive squares in 4 ways, for example, as 41687270338624 + 173733936787489 = 6456568^2 + 13180817^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 215421207126113 - 2² = 215421207126109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215421207186113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54168608 + ... + 58009313.

It is an arithmetic number, because the mean of its divisors is an integer number (27231471010305).

Almost surely, 2^{215421207126113} is an apocalyptic number.

It is an amenable number.

215421207126113 is a deficient number, since it is larger than the sum of its proper divisors (2430560956327).

215421207126113 is a wasteful number, since it uses less digits than its factorization.

215421207126113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112199587.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 215421207126113 in words is "two hundred fifteen trillion, four hundred twenty-one billion, two hundred seven million, one hundred twenty-six thousand, one hundred thirteen".