125302021636 has 24 divisors (see below), whose sum is σ = 251803107360. Its totient is φ = 53957808000.

The previous prime is 125302021597. The next prime is 125302021639. The reversal of 125302021636 is 636120203521.

It is a happy number.

It is a super-2 number, since 2×125302021636² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125302021598 and 125302021607.

It is not an unprimeable number, because it can be changed into a prime (125302021639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74940565 + ... + 74942236.

It is an arithmetic number, because the mean of its divisors is an integer number (10491796140).

Almost surely, 2^125302021636 is an apocalyptic number.

It is an amenable number.

125302021636 is an abundant number, since it is smaller than the sum of its proper divisors (126501085724).

125302021636 is a wasteful number, since it uses less digits than its factorization.

125302021636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149882835 (or 149882833 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 125302021636 in words is "one hundred twenty-five billion, three hundred two million, twenty-one thousand, six hundred thirty-six".