12002311321 has 72 divisors (see below), whose sum is σ = 17427324096. Its totient is φ = 8123834880.

The previous prime is 12002311319. The next prime is 12002311331. The reversal of 12002311321 is 12311320021.

It is not a de Polignac number, because 12002311321 - 2¹ = 12002311319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002311295 and 12002311304.

It is not an unprimeable number, because it can be changed into a prime (12002311301) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2022060 + ... + 2027986.

It is an arithmetic number, because the mean of its divisors is an integer number (242046168).

Almost surely, 2^12002311321 is an apocalyptic number.

12002311321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12002311321 is a deficient number, since it is larger than the sum of its proper divisors (5425012775).

12002311321 is a wasteful number, since it uses less digits than its factorization.

12002311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999 (or 5975 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12002311321 its reverse (12311320021), we get a palindrome (24313631342).

It can be divided in two parts, 12002 and 311321, that added together give a palindrome (323323).

The spelling of 12002311321 in words is "twelve billion, two million, three hundred eleven thousand, three hundred twenty-one".