11271222 has 24 divisors (see below), whose sum is σ = 24496680. Its totient is φ = 3745440.

The previous prime is 11271193. The next prime is 11271223. The reversal of 11271222 is 22217211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11271195 and 11271204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11271223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6597 + ... + 8127.

It is an arithmetic number, because the mean of its divisors is an integer number (1020695).

Almost surely, 2^11271222 is an apocalyptic number.

11271222 is an abundant number, since it is smaller than the sum of its proper divisors (13225458).

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

11271222 is a wasteful number, since it uses less digits than its factorization.

11271222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948 (or 1945 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 11271222 is about 3357.2640646812. The cubic root of 11271222 is about 224.2110441908.

Adding to 11271222 its reverse (22217211), we get a palindrome (33488433).

The spelling of 11271222 in words is "eleven million, two hundred seventy-one thousand, two hundred twenty-two".