125421040120 has 64 divisors (see below), whose sum is σ = 288247623840. Its totient is φ = 49103308800.

The previous prime is 125421040067. The next prime is 125421040139. The reversal of 125421040120 is 21040124521.

It is a super-2 number, since 2×125421040120² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125421040091 and 125421040100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218580 + ... + 546460.

Almost surely, 2^125421040120 is an apocalyptic number.

125421040120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125421040120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144123811920).

125421040120 is an abundant number, since it is smaller than the sum of its proper divisors (162826583720).

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

125421040120 is a wasteful number, since it uses less digits than its factorization.

125421040120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328096 (or 328092 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 125421040120 its reverse (21040124521), we get a palindrome (146461164641).

The spelling of 125421040120 in words is "one hundred twenty-five billion, four hundred twenty-one million, forty thousand, one hundred twenty".