12212121221102 has 24 divisors (see below), whose sum is σ = 20152174350168. Its totient is φ = 5546191093520.

The previous prime is 12212121221081. The next prime is 12212121221189. The reversal of 12212121221102 is 20112212121221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21413873 + ... + 21976764.

It is an arithmetic number, because the mean of its divisors is an integer number (839673931257).

Almost surely, 2^{12212121221102} is an apocalyptic number.

12212121221102 is a deficient number, since it is larger than the sum of its proper divisors (7940053129066).

12212121221102 is a wasteful number, since it uses less digits than its factorization.

12212121221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43391824 (or 43391813 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12212121221102 its reverse (20112212121221), we get a palindrome (32324333342323).

The spelling of 12212121221102 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred two".