12310023221 has 16 divisors (see below), whose sum is σ = 13725432000. Its totient is φ = 10971894528.

The previous prime is 12310023203. The next prime is 12310023263. The reversal of 12310023221 is 12232001321.

It is a cyclic number.

It is not a de Polignac number, because 12310023221 - 2¹⁴ = 12310006837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12310023221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310023281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1083830 + ... + 1095128.

It is an arithmetic number, because the mean of its divisors is an integer number (857839500).

Almost surely, 2^12310023221 is an apocalyptic number.

It is an amenable number.

12310023221 is a deficient number, since it is larger than the sum of its proper divisors (1415408779).

12310023221 is a wasteful number, since it uses less digits than its factorization.

12310023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14708.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12310023221 its reverse (12232001321), we get a palindrome (24542024542).

The spelling of 12310023221 in words is "twelve billion, three hundred ten million, twenty-three thousand, two hundred twenty-one".