12311013221 has 8 divisors (see below), whose sum is σ = 13268398080. Its totient is φ = 11355111792.

The previous prime is 12311013217. The next prime is 12311013259. The reversal of 12311013221 is 12231011321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12311013221 - 2² = 12311013217 is a prime.

It is a super-2 number, since 2×12311013221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12311013221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311013521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353585 + ... + 386838.

It is an arithmetic number, because the mean of its divisors is an integer number (1658549760).

Almost surely, 2^12311013221 is an apocalyptic number.

It is an amenable number.

12311013221 is a deficient number, since it is larger than the sum of its proper divisors (957384859).

12311013221 is a wasteful number, since it uses less digits than its factorization.

12311013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741715.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12311013221 its reverse (12231011321), we get a palindrome (24542024542).

The spelling of 12311013221 in words is "twelve billion, three hundred eleven million, thirteen thousand, two hundred twenty-one".