13221210 has 64 divisors (see below), whose sum is σ = 33466752. Its totient is φ = 3338496.

The previous prime is 13221209. The next prime is 13221227. The reversal of 13221210 is 1212231.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47592 + ... + 47868.

It is an arithmetic number, because the mean of its divisors is an integer number (522918).

Almost surely, 2^13221210 is an apocalyptic number.

13221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13221210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16733376).

13221210 is an abundant number, since it is smaller than the sum of its proper divisors (20245542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13221210 is a wasteful number, since it uses less digits than its factorization.

13221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 13221210 is about 3636.0981834928. The cubic root of 13221210 is about 236.4596638237.

Adding to 13221210 its reverse (1212231), we get a palindrome (14433441).

It can be divided in two parts, 13221 and 210, that added together give a palindrome (13431).

The spelling of 13221210 in words is "thirteen million, two hundred twenty-one thousand, two hundred ten".