12512638875122 has 4 divisors (see below), whose sum is σ = 18768958312686. Its totient is φ = 6256319437560.

The previous prime is 12512638875101. The next prime is 12512638875133. The reversal of 12512638875122 is 22157883621521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10718938492441 + 1793700382681 = 3273979^2 + 1339291^2 .

It is a super-2 number, since 2×12512638875122² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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, 3128159718779 + ... + 3128159718782.

Almost surely, 2^{12512638875122} is an apocalyptic number.

12512638875122 is a deficient number, since it is larger than the sum of its proper divisors (6256319437564).

12512638875122 is an equidigital number, since it uses as much as digits as its factorization.

12512638875122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6256319437563.

The product of its digits is 3225600, while the sum is 53.

The spelling of 12512638875122 in words is "twelve trillion, five hundred twelve billion, six hundred thirty-eight million, eight hundred seventy-five thousand, one hundred twenty-two".