11221312 has 14 divisors (see below), whose sum is σ = 22267418. Its totient is φ = 5610624.

The previous prime is 11221307. The next prime is 11221333. The reversal of 11221312 is 21312211.

It can be written as a sum of positive squares in only one way, i.e., 11128896 + 92416 = 3336^2 + 304^2 .

It is a super-4 number, since 4×11221312⁴ (a number of 29 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11221292 and 11221301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87603 + ... + 87730.

Almost surely, 2^11221312 is an apocalyptic number.

It is an amenable number.

11221312 is a deficient number, since it is larger than the sum of its proper divisors (11046106).

11221312 is an equidigital number, since it uses as much as digits as its factorization.

11221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175345 (or 175335 counting only the distinct ones).

The product of its digits is 24, while the sum is 13.

The square root of 11221312 is about 3349.8226818744. The cubic root of 11221312 is about 223.8796121804.

Adding to 11221312 its reverse (21312211), we get a palindrome (32533523).

It can be divided in two parts, 112213 and 12, that added together give a square (112225 = 335²).

The spelling of 11221312 in words is "eleven million, two hundred twenty-one thousand, three hundred twelve".