12221021112 has 64 divisors (see below), whose sum is σ = 32482529280. Its totient is φ = 3823028352.

The previous prime is 12221021053. The next prime is 12221021147. The reversal of 12221021112 is 21112012221.

It is a junction number, because it is equal to n+sod(n) for n = 12221021091 and 12221021100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179608 + ... + 238119.

It is an arithmetic number, because the mean of its divisors is an integer number (507539520).

Almost surely, 2^12221021112 is an apocalyptic number.

12221021112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221021112 is an abundant number, since it is smaller than the sum of its proper divisors (20261508168).

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

12221021112 is a wasteful number, since it uses less digits than its factorization.

12221021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417812 (or 417808 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12221021112 its reverse (21112012221), we get a palindrome (33333033333).

The spelling of 12221021112 in words is "twelve billion, two hundred twenty-one million, twenty-one thousand, one hundred twelve".