11220412 has 72 divisors (see below), whose sum is σ = 25280640. Its totient is φ = 4324320.

The previous prime is 11220403. The next prime is 11220427. The reversal of 11220412 is 21402211.

It is a happy number.

It is a nialpdrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 11220392 and 11220401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85587 + ... + 85717.

It is an arithmetic number, because the mean of its divisors is an integer number (351120).

Almost surely, 2^11220412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11220412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12640320).

11220412 is an abundant number, since it is smaller than the sum of its proper divisors (14060228).

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

11220412 is a wasteful number, since it uses less digits than its factorization.

11220412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 11220412 is about 3349.6883437120. The cubic root of 11220412 is about 223.8736266344.

Adding to 11220412 its reverse (21402211), we get a palindrome (32622623).

It can be divided in two parts, 112 and 20412, that multiplied together give a square (2286144 = 1512²).

The spelling of 11220412 in words is "eleven million, two hundred twenty thousand, four hundred twelve".