12112221220312 has 16 divisors (see below), whose sum is σ = 22712734454400. Its totient is φ = 6055492032480.

The previous prime is 12112221220301. The next prime is 12112221220343. The reversal of 12112221220312 is 21302212221121.

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, 77238987 + ... + 77395642.

It is an arithmetic number, because the mean of its divisors is an integer number (1419545903400).

Almost surely, 2^{12112221220312} is an apocalyptic number.

It is an amenable number.

12112221220312 is a deficient number, since it is larger than the sum of its proper divisors (10600513234088).

12112221220312 is a wasteful number, since it uses less digits than its factorization.

12112221220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154644426 (or 154644422 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 12112221220312 its reverse (21302212221121), we get a palindrome (33414433441433).

The spelling of 12112221220312 in words is "twelve trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, three hundred twelve".