100221111209 has 4 divisors (see below), whose sum is σ = 100835964816. Its totient is φ = 99606257604.

The previous prime is 100221111203. The next prime is 100221111241. The reversal of 100221111209 is 902111122001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221111209 is a prime.

It is a super-2 number, since 2×100221111209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100221111203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307426559 + ... + 307426884.

It is an arithmetic number, because the mean of its divisors is an integer number (25208991204).

Almost surely, 2^100221111209 is an apocalyptic number.

It is an amenable number.

100221111209 is a deficient number, since it is larger than the sum of its proper divisors (614853607).

100221111209 is an equidigital number, since it uses as much as digits as its factorization.

100221111209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614853606.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 100221111209 in words is "one hundred billion, two hundred twenty-one million, one hundred eleven thousand, two hundred nine".