1256112125203 has 32 divisors (see below), whose sum is σ = 1417498693632. Its totient is φ = 1104406617600.

The previous prime is 1256112125137. The next prime is 1256112125207. The reversal of 1256112125203 is 3025212116521.

It is not a de Polignac number, because 1256112125203 - 2²⁵ = 1256078570771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1256112125207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252889026 + ... + 252893992.

It is an arithmetic number, because the mean of its divisors is an integer number (44296834176).

Almost surely, 2^{1256112125203} is an apocalyptic number.

1256112125203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1256112125203 is a deficient number, since it is larger than the sum of its proper divisors (161386568429).

1256112125203 is a wasteful number, since it uses less digits than its factorization.

1256112125203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 1256112125203 in words is "one trillion, two hundred fifty-six billion, one hundred twelve million, one hundred twenty-five thousand, two hundred three".