12220123312 has 10 divisors (see below), whose sum is σ = 23676488948. Its totient is φ = 6110061648.

The previous prime is 12220123309. The next prime is 12220123313. The reversal of 12220123312 is 21332102221.

It is a self number, because there is not a number n which added to its sum of digits gives 12220123312.

It is not an unprimeable number, because it can be changed into a prime (12220123313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381878838 + ... + 381878869.

Almost surely, 2^12220123312 is an apocalyptic number.

It is an amenable number.

12220123312 is a deficient number, since it is larger than the sum of its proper divisors (11456365636).

12220123312 is an equidigital number, since it uses as much as digits as its factorization.

12220123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763757715 (or 763757709 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12220123312 its reverse (21332102221), we get a palindrome (33552225533).

The spelling of 12220123312 in words is "twelve billion, two hundred twenty million, one hundred twenty-three thousand, three hundred twelve".