12221103312012 has 24 divisors (see below), whose sum is σ = 32589608832256. Its totient is φ = 3491743803408.

The previous prime is 12221103311983. The next prime is 12221103312037. The reversal of 12221103312012 is 21021330112221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12221103312012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72744662488 + ... + 72744662655.

Almost surely, 2^{12221103312012} is an apocalyptic number.

12221103312012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221103312012 is an abundant number, since it is smaller than the sum of its proper divisors (20368505520244).

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

12221103312012 is a wasteful number, since it uses less digits than its factorization.

12221103312012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145489325157 (or 145489325155 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12221103312012 its reverse (21021330112221), we get a palindrome (33242433424233).

The spelling of 12221103312012 in words is "twelve trillion, two hundred twenty-one billion, one hundred three million, three hundred twelve thousand, twelve".