13221122 has 4 divisors (see below), whose sum is σ = 19831686. Its totient is φ = 6610560.

The previous prime is 13221101. The next prime is 13221137. The reversal of 13221122 is 22112231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22112231 = 47 ⋅470473.

It can be written as a sum of positive squares in only one way, i.e., 12243001 + 978121 = 3499^2 + 989^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13221097 and 13221106.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3305279 + ... + 3305282.

Almost surely, 2^13221122 is an apocalyptic number.

13221122 is a deficient number, since it is larger than the sum of its proper divisors (6610564).

13221122 is an equidigital number, since it uses as much as digits as its factorization.

13221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6610563.

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

The square root of 13221122 is about 3636.0860825894. The cubic root of 13221122 is about 236.4591391996.

Adding to 13221122 its reverse (22112231), we get a palindrome (35333353).

The spelling of 13221122 in words is "thirteen million, two hundred twenty-one thousand, one hundred twenty-two".