12222120312 has 48 divisors (see below), whose sum is σ = 33996220440. Its totient is φ = 3963930048.

The previous prime is 12222120307. The next prime is 12222120319. The reversal of 12222120312 is 21302122221.

12222120312 is a `hidden beast` number, since 12 + 222 + 120 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222120319) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2291278 + ... + 2296605.

Almost surely, 2^12222120312 is an apocalyptic number.

12222120312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12222120312 is an abundant number, since it is smaller than the sum of its proper divisors (21774100128).

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

12222120312 is a wasteful number, since it uses less digits than its factorization.

12222120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587932 (or 4587925 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12222120312 its reverse (21302122221), we get a palindrome (33524242533).

The spelling of 12222120312 in words is "twelve billion, two hundred twenty-two million, one hundred twenty thousand, three hundred twelve".