13221210031 has 8 divisors (see below), whose sum is σ = 13588401920. Its totient is φ = 12859014168.

The previous prime is 13221210019. The next prime is 13221210049. The reversal of 13221210031 is 13001212231.

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

It is a cyclic number.

It is not a de Polignac number, because 13221210031 - 2⁵ = 13221209999 is a prime.

It is a super-2 number, since 2×13221210031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221209987 and 13221210014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221210011) 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, 1243641 + ... + 1254226.

It is an arithmetic number, because the mean of its divisors is an integer number (1698550240).

Almost surely, 2^13221210031 is an apocalyptic number.

13221210031 is a deficient number, since it is larger than the sum of its proper divisors (367191889).

13221210031 is an equidigital number, since it uses as much as digits as its factorization.

13221210031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2498013.

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

Adding to 13221210031 its reverse (13001212231), we get a palindrome (26222422262).

The spelling of 13221210031 in words is "thirteen billion, two hundred twenty-one million, two hundred ten thousand, thirty-one".