125421031312 has 20 divisors (see below), whose sum is σ = 244634147100. Its totient is φ = 62289638528.

The previous prime is 125421031301. The next prime is 125421031339. The reversal of 125421031312 is 213130124521.

It can be written as a sum of positive squares in 2 ways, for example, as 7151070096 + 118269961216 = 84564^2 + 343904^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26302363 + ... + 26307130.

It is an arithmetic number, because the mean of its divisors is an integer number (12231707355).

Almost surely, 2^125421031312 is an apocalyptic number.

It is an amenable number.

125421031312 is a deficient number, since it is larger than the sum of its proper divisors (119213115788).

125421031312 is a wasteful number, since it uses less digits than its factorization.

125421031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52609650 (or 52609644 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 125421031312 its reverse (213130124521), we get a palindrome (338551155833).

The spelling of 125421031312 in words is "one hundred twenty-five billion, four hundred twenty-one million, thirty-one thousand, three hundred twelve".