11312220 has 48 divisors (see below), whose sum is σ = 33344640. Its totient is φ = 2857536.

The previous prime is 11312209. The next prime is 11312221. The reversal of 11312220 is 2221311.

11312220 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11312196 and 11312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3822 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (694680).

Almost surely, 2^11312220 is an apocalyptic number.

11312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11312220 is an abundant number, since it is smaller than the sum of its proper divisors (22032420).

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

11312220 is a wasteful number, since it uses less digits than its factorization.

11312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9954 (or 9952 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 11312220 is about 3363.3643870387. The cubic root of 11312220 is about 224.4825640432.

Adding to 11312220 its reverse (2221311), we get a palindrome (13533531).

Subtracting from 11312220 its reverse (2221311), we obtain a palindrome (9090909).

The spelling of 11312220 in words is "eleven million, three hundred twelve thousand, two hundred twenty".