12320031002221 has 8 divisors (see below), whose sum is σ = 13494557284920. Its totient is φ = 11195484561408.

The previous prime is 12320031002161. The next prime is 12320031002243. The reversal of 12320031002221 is 12220013002321.

It can be written as a sum of positive squares in 4 ways, for example, as 2200442925321 + 10119588076900 = 1483389^2 + 3181130^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320031002221 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 (12320031002281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12494959956 + ... + 12494960941.

It is an arithmetic number, because the mean of its divisors is an integer number (1686819660615).

Almost surely, 2^{12320031002221} is an apocalyptic number.

It is an amenable number.

12320031002221 is a deficient number, since it is larger than the sum of its proper divisors (1174526282699).

12320031002221 is a wasteful number, since it uses less digits than its factorization.

12320031002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24989920943.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12320031002221 its reverse (12220013002321), we get a palindrome (24540044004542).

The spelling of 12320031002221 in words is "twelve trillion, three hundred twenty billion, thirty-one million, two thousand, two hundred twenty-one".