12031322313 has 4 divisors (see below), whose sum is σ = 16041763088. Its totient is φ = 8020881540.

The previous prime is 12031322311. The next prime is 12031322321. The reversal of 12031322313 is 31322313021.

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: 31322313021 = 3 ⋅10440771007.

It is not a de Polignac number, because 12031322313 - 2¹ = 12031322311 is a prime.

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 12031322313.

It is not an unprimeable number, because it can be changed into a prime (12031322311) 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, 2005220383 + ... + 2005220388.

It is an arithmetic number, because the mean of its divisors is an integer number (4010440772).

Almost surely, 2^12031322313 is an apocalyptic number.

It is an amenable number.

12031322313 is a deficient number, since it is larger than the sum of its proper divisors (4010440775).

12031322313 is an equidigital number, since it uses as much as digits as its factorization.

12031322313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4010440774.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 12031322313 its reverse (31322313021), we get a palindrome (43353635334).

The spelling of 12031322313 in words is "twelve billion, thirty-one million, three hundred twenty-two thousand, three hundred thirteen".