13231133221 has 4 divisors (see below), whose sum is σ = 13398616000. Its totient is φ = 13063650444.

The previous prime is 13231133213. The next prime is 13231133263. The reversal of 13231133221 is 12233113231.

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: 12233113231 = 997 ⋅12269923.

It is a cyclic number.

It is not a de Polignac number, because 13231133221 - 2³ = 13231133213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13231133192 and 13231133201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231130221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83741271 + ... + 83741428.

It is an arithmetic number, because the mean of its divisors is an integer number (3349654000).

Almost surely, 2^13231133221 is an apocalyptic number.

It is an amenable number.

13231133221 is a deficient number, since it is larger than the sum of its proper divisors (167482779).

13231133221 is an equidigital number, since it uses as much as digits as its factorization.

13231133221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167482778.

The product of its digits is 648, while the sum is 22.

Adding to 13231133221 its reverse (12233113231), we get a palindrome (25464246452).

The spelling of 13231133221 in words is "thirteen billion, two hundred thirty-one million, one hundred thirty-three thousand, two hundred twenty-one".