12221011312 has 40 divisors (see below), whose sum is σ = 23967327600. Its totient is φ = 6036172800.

The previous prime is 12221011303. The next prime is 12221011339. The reversal of 12221011312 is 21311012221.

It is a super-2 number, since 2×12221011312² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent 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, 717163 + ... + 734005.

It is an arithmetic number, because the mean of its divisors is an integer number (599183190).

Almost surely, 2^12221011312 is an apocalyptic number.

It is an amenable number.

12221011312 is a deficient number, since it is larger than the sum of its proper divisors (11746316288).

12221011312 is a wasteful number, since it uses less digits than its factorization.

12221011312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17401 (or 17395 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12221011312 its reverse (21311012221), we get a palindrome (33532023533).

Subtracting 12221011312 from its reverse (21311012221), we obtain a palindrome (9090000909).

The spelling of 12221011312 in words is "twelve billion, two hundred twenty-one million, eleven thousand, three hundred twelve".