13222121 has 8 divisors (see below), whose sum is σ = 14455584. Its totient is φ = 11993920.

The previous prime is 13222109. The next prime is 13222123. The reversal of 13222121 is 12122231.

It is a happy number.

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 13222121 - 2¹⁴ = 13205737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13222096 and 13222105.

It is not an unprimeable number, because it can be changed into a prime (13222123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5510 + ... + 7536.

It is an arithmetic number, because the mean of its divisors is an integer number (1806948).

Almost surely, 2^13222121 is an apocalyptic number.

13222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13222121 is a deficient number, since it is larger than the sum of its proper divisors (1233463).

13222121 is a wasteful number, since it uses less digits than its factorization.

13222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631.

The product of its digits is 48, while the sum is 14.

The square root of 13222121 is about 3636.2234529798. The cubic root of 13222121 is about 236.4650947387.

Adding to 13222121 its reverse (12122231), we get a palindrome (25344352).

It can be divided in two parts, 1322 and 2121, that added together give a palindrome (3443).

The spelling of 13222121 in words is "thirteen million, two hundred twenty-two thousand, one hundred twenty-one".