11227212 has 18 divisors (see below), whose sum is σ = 28379988. Its totient is φ = 3742392.

The previous prime is 11227211. The next prime is 11227213. The reversal of 11227212 is 21272211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11227211) and next prime (11227213).

It is a tau number, because it is divible by the number of its divisors (18).

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

It is not an unprimeable number, because it can be changed into a prime (11227211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155898 + ... + 155969.

It is an arithmetic number, because the mean of its divisors is an integer number (1576666).

Almost surely, 2^11227212 is an apocalyptic number.

11227212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11227212 is an abundant number, since it is smaller than the sum of its proper divisors (17152776).

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

11227212 is a wasteful number, since it uses less digits than its factorization.

11227212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311877 (or 311872 counting only the distinct ones).

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

The square root of 11227212 is about 3350.7032097755. The cubic root of 11227212 is about 223.9188428360.

Adding to 11227212 its reverse (21272211), we get a palindrome (32499423).

The spelling of 11227212 in words is "eleven million, two hundred twenty-seven thousand, two hundred twelve".