13221222004 has 12 divisors (see below), whose sum is σ = 23137944228. Its totient is φ = 6610380800.

The previous prime is 13221221983. The next prime is 13221222019. The reversal of 13221222004 is 40022212231.

It can be written as a sum of positive squares in 2 ways, for example, as 11935999504 + 1285222500 = 109252^2 + 35850^2 .

It is a super-2 number, since 2×13221222004² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189684 + ... + 249844.

It is an arithmetic number, because the mean of its divisors is an integer number (1928162019).

Almost surely, 2^13221222004 is an apocalyptic number.

It is an amenable number.

13221222004 is a deficient number, since it is larger than the sum of its proper divisors (9916722224).

13221222004 is a wasteful number, since it uses less digits than its factorization.

13221222004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115106 (or 115104 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 13221222004 its reverse (40022212231), we get a palindrome (53243434235).

It can be divided in two parts, 13221 and 222004, that added together give a square (235225 = 485²).

The spelling of 13221222004 in words is "thirteen billion, two hundred twenty-one million, two hundred twenty-two thousand, four".