13221222664 has 64 divisors (see below), whose sum is σ = 27948009600. Its totient is φ = 5817816576.

The previous prime is 13221222629. The next prime is 13221222683. The reversal of 13221222664 is 46622212231.

It is a super-3 number, since 3×13221222664³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 739867 + ... + 757525.

It is an arithmetic number, because the mean of its divisors is an integer number (436687650).

Almost surely, 2^13221222664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13221222664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13974004800).

13221222664 is an abundant number, since it is smaller than the sum of its proper divisors (14726786936).

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

13221222664 is a wasteful number, since it uses less digits than its factorization.

13221222664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18014 (or 18010 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

Adding to 13221222664 its reverse (46622212231), we get a palindrome (59843434895).

The spelling of 13221222664 in words is "thirteen billion, two hundred twenty-one million, two hundred twenty-two thousand, six hundred sixty-four".