12312113021 has 8 divisors (see below), whose sum is σ = 13260678144. Its totient is φ = 11363759280.

The previous prime is 12312113017. The next prime is 12312113041. The reversal of 12312113021 is 12031121321.

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 12312113021 - 2² = 12312113017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312113041) 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, 80636 + ... + 176426.

It is an arithmetic number, because the mean of its divisors is an integer number (1657584768).

Almost surely, 2^12312113021 is an apocalyptic number.

It is an amenable number.

12312113021 is a deficient number, since it is larger than the sum of its proper divisors (948565123).

12312113021 is an equidigital number, since it uses as much as digits as its factorization.

12312113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105691.

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

Adding to 12312113021 its reverse (12031121321), we get a palindrome (24343234342).

The spelling of 12312113021 in words is "twelve billion, three hundred twelve million, one hundred thirteen thousand, twenty-one".