12221211331 has 48 divisors (see below), whose sum is σ = 15411078144. Its totient is φ = 9482997888.

The previous prime is 12221211319. The next prime is 12221211377. The reversal of 12221211331 is 13311212221.

It is not a de Polignac number, because 12221211331 - 2⁷ = 12221211203 is a prime.

It is a super-2 number, since 2×12221211331² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 12221211299 and 12221211308.

It is not an unprimeable number, because it can be changed into a prime (12221211031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5105871 + ... + 5108263.

It is an arithmetic number, because the mean of its divisors is an integer number (321064128).

Almost surely, 2^12221211331 is an apocalyptic number.

12221211331 is a deficient number, since it is larger than the sum of its proper divisors (3189866813).

12221211331 is a wasteful number, since it uses less digits than its factorization.

12221211331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528 (or 2509 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 12221211331 its reverse (13311212221), we get a palindrome (25532423552).

The spelling of 12221211331 in words is "twelve billion, two hundred twenty-one million, two hundred eleven thousand, three hundred thirty-one".