100221221212 has 12 divisors (see below), whose sum is σ = 200442442480. Its totient is φ = 42951951936.

The previous prime is 100221221209. The next prime is 100221221237. The reversal of 100221221212 is 212122122001.

It is a happy number.

100221221212 is an admirable number.

It is a congruent number.

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, 1789664637 + ... + 1789664692.

Almost surely, 2^100221221212 is an apocalyptic number.

It is an amenable number.

100221221212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

100221221212 is a wasteful number, since it uses less digits than its factorization.

100221221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3579329340 (or 3579329338 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100221221212 its reverse (212122122001), we get a palindrome (312343343213).

The spelling of 100221221212 in words is "one hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twelve".