12221320012 has 24 divisors (see below), whose sum is σ = 24136151760. Its totient is φ = 5363588160.

The previous prime is 12221319953. The next prime is 12221320021. The reversal of 12221320012 is 21002312221.

It is a happy number.

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, 4787643 + ... + 4790194.

It is an arithmetic number, because the mean of its divisors is an integer number (1005672990).

Almost surely, 2^12221320012 is an apocalyptic number.

It is an amenable number.

12221320012 is a deficient number, since it is larger than the sum of its proper divisors (11914831748).

12221320012 is a wasteful number, since it uses less digits than its factorization.

12221320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9577881 (or 9577879 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12221320012 its reverse (21002312221), we get a palindrome (33223632233).

It can be divided in two parts, 12221 and 320012, that added together give a palindrome (332233).

The spelling of 12221320012 in words is "twelve billion, two hundred twenty-one million, three hundred twenty thousand, twelve".