100000021012200 has 144 divisors (see below), whose sum is σ = 344909982612780. Its totient is φ = 25945951380480.

The previous prime is 100000021012187. The next prime is 100000021012219. The reversal of 100000021012200 is 2210120000001.

It can be written as a sum of positive squares in 6 ways, for example, as 58866243484356 + 41133777527844 = 7672434^2 + 6413562^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 750684309 + ... + 750817508.

Almost surely, 2^{100000021012200} is an apocalyptic number.

100000021012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100000021012200 is an abundant number, since it is smaller than the sum of its proper divisors (244909961600580).

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

100000021012200 is a wasteful number, since it uses less digits than its factorization.

100000021012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501501876 (or 1501501864 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100000021012200 its reverse (2210120000001), we get a palindrome (102210141012201).

The spelling of 100000021012200 in words is "one hundred trillion, twenty-one million, twelve thousand, two hundred".