1212220100212 has 12 divisors (see below), whose sum is σ = 2314238373216. Its totient is φ = 551009136440.

The previous prime is 1212220100177. The next prime is 1212220100243. The reversal of 1212220100212 is 2120010222121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13775228368 + ... + 13775228455.

It is an arithmetic number, because the mean of its divisors is an integer number (192853197768).

Almost surely, 2^{1212220100212} is an apocalyptic number.

It is an amenable number.

1212220100212 is a deficient number, since it is larger than the sum of its proper divisors (1102018273004).

1212220100212 is a wasteful number, since it uses less digits than its factorization.

1212220100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27550456838 (or 27550456836 counting only the distinct ones).

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

Adding to 1212220100212 its reverse (2120010222121), we get a palindrome (3332230322333).

The spelling of 1212220100212 in words is "one trillion, two hundred twelve billion, two hundred twenty million, one hundred thousand, two hundred twelve".