13231203221 has 8 divisors (see below), whose sum is σ = 13393057440. Its totient is φ = 13069407312.

The previous prime is 13231203211. The next prime is 13231203239. The reversal of 13231203221 is 12230213231.

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-13231203221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13231203193 and 13231203202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231203211) 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, 597770 + ... + 619508.

It is an arithmetic number, because the mean of its divisors is an integer number (1674132180).

Almost surely, 2^13231203221 is an apocalyptic number.

It is an amenable number.

13231203221 is a deficient number, since it is larger than the sum of its proper divisors (161854219).

13231203221 is an equidigital number, since it uses as much as digits as its factorization.

13231203221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29155.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13231203221 its reverse (12230213231), we get a palindrome (25461416452).

The spelling of 13231203221 in words is "thirteen billion, two hundred thirty-one million, two hundred three thousand, two hundred twenty-one".