12311222 has 16 divisors (see below), whose sum is σ = 23023872. Its totient is φ = 4796520.

The previous prime is 12311219. The next prime is 12311251. The reversal of 12311222 is 22211321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 12311197 and 12311206.

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, 39818 + ... + 40125.

It is an arithmetic number, because the mean of its divisors is an integer number (1438992).

Almost surely, 2^12311222 is an apocalyptic number.

12311222 is a deficient number, since it is larger than the sum of its proper divisors (10712650).

12311222 is a wasteful number, since it uses less digits than its factorization.

12311222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79963.

The product of its digits is 48, while the sum is 14.

The square root of 12311222 is about 3508.7350997190. The cubic root of 12311222 is about 230.9052040089.

Adding to 12311222 its reverse (22211321), we get a palindrome (34522543).

Subtracting 12311222 from its reverse (22211321), we obtain a palindrome (9900099).

The spelling of 12311222 in words is "twelve million, three hundred eleven thousand, two hundred twenty-two".