125531012124 has 36 divisors (see below), whose sum is σ = 362645146864. Its totient is φ = 35866003392.

The previous prime is 125531012099. The next prime is 125531012137. The reversal of 125531012124 is 421210135521.

It is a happy number.

125531012124 is a `hidden beast` number, since 1 + 2 + 5 + 531 + 0 + 1 + 2 + 124 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249069217 + ... + 249069720.

Almost surely, 2^125531012124 is an apocalyptic number.

125531012124 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

125531012124 is an abundant number, since it is smaller than the sum of its proper divisors (237114134740).

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

125531012124 is a wasteful number, since it uses less digits than its factorization.

125531012124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498138954 (or 498138949 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 125531012124 its reverse (421210135521), we get a palindrome (546741147645).

The spelling of 125531012124 in words is "one hundred twenty-five billion, five hundred thirty-one million, twelve thousand, one hundred twenty-four".