15252386878121 has 2 divisors, whose sum is σ = 15252386878122. Its totient is φ = 15252386878120.

The previous prime is 15252386878117. The next prime is 15252386878243. The reversal of 15252386878121 is 12187868325251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12742301172496 + 2510085705625 = 3569636^2 + 1584325^2 .

It is a cyclic number.

It is not a de Polignac number, because 15252386878121 - 2² = 15252386878117 is a prime.

It is not a weakly prime, because it can be changed into another prime (15252386878111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7626193439060 + 7626193439061.

It is an arithmetic number, because the mean of its divisors is an integer number (7626193439061).

Almost surely, 2^{15252386878121} is an apocalyptic number.

It is an amenable number.

15252386878121 is a deficient number, since it is larger than the sum of its proper divisors (1).

15252386878121 is an equidigital number, since it uses as much as digits as its factorization.

15252386878121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12902400, while the sum is 59.

The spelling of 15252386878121 in words is "fifteen trillion, two hundred fifty-two billion, three hundred eighty-six million, eight hundred seventy-eight thousand, one hundred twenty-one".