12031102321 has 4 divisors (see below), whose sum is σ = 13749831232. Its totient is φ = 10312373412.

The previous prime is 12031102277. The next prime is 12031102331. The reversal of 12031102321 is 12320113021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12320113021 = 17761 ⋅693661.

It is a cyclic number.

It is not a de Polignac number, because 12031102321 - 2¹⁹ = 12030578033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12031102295 and 12031102304.

It is not an unprimeable number, because it can be changed into a prime (12031102331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859364445 + ... + 859364458.

It is an arithmetic number, because the mean of its divisors is an integer number (3437457808).

Almost surely, 2^12031102321 is an apocalyptic number.

It is an amenable number.

12031102321 is a deficient number, since it is larger than the sum of its proper divisors (1718728911).

12031102321 is an equidigital number, since it uses as much as digits as its factorization.

12031102321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718728910.

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

Adding to 12031102321 its reverse (12320113021), we get a palindrome (24351215342).

The spelling of 12031102321 in words is "twelve billion, thirty-one million, one hundred two thousand, three hundred twenty-one".