100212221212 has 12 divisors (see below), whose sum is σ = 175558556320. Its totient is φ = 50052633696.

The previous prime is 100212221183. The next prime is 100212221257. The reversal of 100212221212 is 212122212001.

It is a happy 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, 13365012 + ... + 13372507.

Almost surely, 2^100212221212 is an apocalyptic number.

It is an amenable number.

100212221212 is a deficient number, since it is larger than the sum of its proper divisors (75346335108).

100212221212 is a wasteful number, since it uses less digits than its factorization.

100212221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26738460 (or 26738458 counting only the distinct ones).

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

Adding to 100212221212 its reverse (212122212001), we get a palindrome (312334433213).

The spelling of 100212221212 in words is "one hundred billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twelve".