100221120100 has 36 divisors (see below), whose sum is σ = 217596722224. Its totient is φ = 40066901280.

The previous prime is 100221120061. The next prime is 100221120107. The reversal of 100221120100 is 1021122001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (100221120107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81702 + ... + 455101.

Almost surely, 2^100221120100 is an apocalyptic number.

100221120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100221120100 is an abundant number, since it is smaller than the sum of its proper divisors (117375602124).

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

100221120100 is a wasteful number, since it uses less digits than its factorization.

100221120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538684 (or 538677 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 100221120100 its reverse (1021122001), we get a palindrome (101242242101).

The spelling of 100221120100 in words is "one hundred billion, two hundred twenty-one million, one hundred twenty thousand, one hundred".