100021012252 has 108 divisors (see below), whose sum is σ = 218450096424. Its totient is φ = 39942873600.

The previous prime is 100021012207. The next prime is 100021012253. The reversal of 100021012252 is 252210120001.

It is a happy number.

It is a super-2 number, since 2×100021012252² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100021012253) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5712303 + ... + 5729785.

It is an arithmetic number, because the mean of its divisors is an integer number (2022686078).

Almost surely, 2^100021012252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100021012252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109225048212).

100021012252 is an abundant number, since it is smaller than the sum of its proper divisors (118429084172).

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

100021012252 is a wasteful number, since it uses less digits than its factorization.

100021012252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17636 (or 17610 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 100021012252 its reverse (252210120001), we get a palindrome (352231132253).

The spelling of 100021012252 in words is "one hundred billion, twenty-one million, twelve thousand, two hundred fifty-two".