13112222 has 4 divisors (see below), whose sum is σ = 19668336. Its totient is φ = 6556110.

The previous prime is 13112221. The next prime is 13112233. The reversal of 13112222 is 22221131.

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: 22221131 = 191 ⋅116341.

It is a junction number, because it is equal to n+sod(n) for n = 13112197 and 13112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112221) 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 as a sum of consecutive naturals, namely, 3278054 + ... + 3278057.

It is an arithmetic number, because the mean of its divisors is an integer number (4917084).

Almost surely, 2^13112222 is an apocalyptic number.

13112222 is a deficient number, since it is larger than the sum of its proper divisors (6556114).

13112222 is an equidigital number, since it uses as much as digits as its factorization.

13112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6556113.

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

The square root of 13112222 is about 3621.0802255681. The cubic root of 13112222 is about 235.8081247082.

Adding to 13112222 its reverse (22221131), we get a palindrome (35333353).

The spelling of 13112222 in words is "thirteen million, one hundred twelve thousand, two hundred twenty-two".