12220221312312 has 96 divisors (see below), whose sum is σ = 33390541198080. Its totient is φ = 3724927140480.

The previous prime is 12220221312293. The next prime is 12220221312317. The reversal of 12220221312312 is 21321312202221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220221312317) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13644864 + ... + 14512847.

It is an arithmetic number, because the mean of its divisors is an integer number (347818137480).

Almost surely, 2^{12220221312312} is an apocalyptic number.

12220221312312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12220221312312 is an abundant number, since it is smaller than the sum of its proper divisors (21170319885768).

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

12220221312312 is a wasteful number, since it uses less digits than its factorization.

12220221312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28157853 (or 28157836 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 12220221312312 its reverse (21321312202221), we get a palindrome (33541533514533).

The spelling of 12220221312312 in words is "twelve trillion, two hundred twenty billion, two hundred twenty-one million, three hundred twelve thousand, three hundred twelve".