10000221220 has 24 divisors (see below), whose sum is σ = 22909598208. Its totient is φ = 3636444000.

The previous prime is 10000221199. The next prime is 10000221251. The reversal of 10000221220 is 2212200001.

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

It is a junction number, because it is equal to n+sod(n) for n = 10000221197 and 10000221206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22727556 + ... + 22727995.

It is an arithmetic number, because the mean of its divisors is an integer number (954566592).

Almost surely, 2^10000221220 is an apocalyptic number.

10000221220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10000221220 is an abundant number, since it is smaller than the sum of its proper divisors (12909376988).

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

10000221220 is a wasteful number, since it uses less digits than its factorization.

10000221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45455571 (or 45455569 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 10000221220 its reverse (2212200001), we get a palindrome (12212421221).

The spelling of 10000221220 in words is "ten billion, two hundred twenty-one thousand, two hundred twenty".