125421052020 has 144 divisors (see below), whose sum is σ = 392335972224. Its totient is φ = 29906553600.

The previous prime is 125421052013. The next prime is 125421052069. The reversal of 125421052020 is 20250124521.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 301257 + ... + 584463.

Almost surely, 2^125421052020 is an apocalyptic number.

125421052020 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 125421052020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196167986112).

125421052020 is an abundant number, since it is smaller than the sum of its proper divisors (266914920204).

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

125421052020 is a wasteful number, since it uses less digits than its factorization.

125421052020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283302 (or 283289 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 125421052020 its reverse (20250124521), we get a palindrome (145671176541).

The spelling of 125421052020 in words is "one hundred twenty-five billion, four hundred twenty-one million, fifty-two thousand, twenty".