11151220 has 24 divisors (see below), whose sum is σ = 23917824. Its totient is φ = 4365216.

The previous prime is 11151209. The next prime is 11151241. The reversal of 11151220 is 2215111.

11151220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 11151220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4992 + ... + 6871.

It is an arithmetic number, because the mean of its divisors is an integer number (996576).

Almost surely, 2^11151220 is an apocalyptic number.

11151220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11151220 is an abundant number, since it is smaller than the sum of its proper divisors (12766604).

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

11151220 is a wasteful number, since it uses less digits than its factorization.

11151220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11919 (or 11917 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 11151220 is about 3339.3442470042. The cubic root of 11151220 is about 223.4124963789.

Adding to 11151220 its reverse (2215111), we get a palindrome (13366331).

The spelling of 11151220 in words is "eleven million, one hundred fifty-one thousand, two hundred twenty".