100221212320 has 24 divisors (see below), whose sum is σ = 236772614484. Its totient is φ = 40088484864.

The previous prime is 100221212297. The next prime is 100221212381. The reversal of 100221212320 is 23212122001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 96033051664 + 4188160656 = 309892^2 + 64716^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 100221212294 and 100221212303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313191129 + ... + 313191448.

Almost surely, 2^100221212320 is an apocalyptic number.

100221212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100221212320 is an abundant number, since it is smaller than the sum of its proper divisors (136551402164).

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

100221212320 is an equidigital number, since it uses as much as digits as its factorization.

100221212320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626382592 (or 626382584 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 100221212320 its reverse (23212122001), we get a palindrome (123433334321).

The spelling of 100221212320 in words is "one hundred billion, two hundred twenty-one million, two hundred twelve thousand, three hundred twenty".