100000000221 has 16 divisors (see below), whose sum is σ = 148198973760. Its totient is φ = 59462549120.

The previous prime is 100000000211. The next prime is 100000000223. The reversal of 100000000221 is 122000000001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 100000000221 - 2⁹ = 99999999709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000000223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28586016 + ... + 28589513.

It is an arithmetic number, because the mean of its divisors is an integer number (9262435860).

Almost surely, 2^100000000221 is an apocalyptic number.

100000000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100000000221 is a deficient number, since it is larger than the sum of its proper divisors (48198973539).

100000000221 is a wasteful number, since it uses less digits than its factorization.

100000000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57175596.

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 100000000221 its reverse (122000000001), we get a palindrome (222000000222).

The spelling of 100000000221 in words is "one hundred billion, two hundred twenty-one", and thus it is an aban number.