100021012208 has 40 divisors (see below), whose sum is σ = 208889453136. Its totient is φ = 46121126400.

The previous prime is 100021012207. The next prime is 100021012253. The reversal of 100021012208 is 802210120001.

It is a happy number.

It is a super-2 number, since 2×100021012208² (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 (100021012207) 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, 6548 + ... + 447308.

Almost surely, 2^100021012208 is an apocalyptic number.

It is an amenable number.

100021012208 is an abundant number, since it is smaller than the sum of its proper divisors (108868440928).

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

100021012208 is a wasteful number, since it uses less digits than its factorization.

100021012208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441873 (or 441867 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 100021012208 its reverse (802210120001), we get a palindrome (902231132209).

The spelling of 100021012208 in words is "one hundred billion, twenty-one million, twelve thousand, two hundred eight".