100021122200 has 96 divisors (see below), whose sum is σ = 236355809760. Its totient is φ = 39356083200.

The previous prime is 100021122199. The next prime is 100021122209. The reversal of 100021122200 is 2221120001.

It is a happy number.

It is a super-2 number, since 2×100021122200² (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 (100021122209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6481694 + ... + 6497106.

It is an arithmetic number, because the mean of its divisors is an integer number (2462039685).

Almost surely, 2^100021122200 is an apocalyptic number.

100021122200 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 100021122200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118177904880).

100021122200 is an abundant number, since it is smaller than the sum of its proper divisors (136334687560).

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

100021122200 is a wasteful number, since it uses less digits than its factorization.

100021122200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15957 (or 15948 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100021122200 its reverse (2221120001), we get a palindrome (102242242201).

The spelling of 100021122200 in words is "one hundred billion, twenty-one million, one hundred twenty-two thousand, two hundred".