125521004412 has 72 divisors (see below), whose sum is σ = 317942456832. Its totient is φ = 41754304800.

The previous prime is 125521004387. The next prime is 125521004417. The reversal of 125521004412 is 214400125521.

It is a happy number.

125521004412 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 210 + 0 + 441 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125521004417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67958473 + ... + 67960319.

It is an arithmetic number, because the mean of its divisors is an integer number (4415867456).

Almost surely, 2^125521004412 is an apocalyptic number.

125521004412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

125521004412 is an abundant number, since it is smaller than the sum of its proper divisors (192421452420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125521004412 is a wasteful number, since it uses less digits than its factorization.

125521004412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719 (or 4714 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 125521004412 its reverse (214400125521), we get a palindrome (339921129933).

The spelling of 125521004412 in words is "one hundred twenty-five billion, five hundred twenty-one million, four thousand, four hundred twelve".