11012220 has 48 divisors (see below), whose sum is σ = 34261920. Its totient is φ = 2936448.

The previous prime is 11012219. The next prime is 11012227. The reversal of 11012220 is 2221011.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012227) 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, 9657 + ... + 10736.

It is an arithmetic number, because the mean of its divisors is an integer number (713790).

Almost surely, 2^11012220 is an apocalyptic number.

11012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11012220 is an abundant number, since it is smaller than the sum of its proper divisors (23249700).

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

11012220 is a wasteful number, since it uses less digits than its factorization.

11012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20411 (or 20403 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 11012220 is about 3318.4665133161. The cubic root of 11012220 is about 222.4803332362.

Adding to 11012220 its reverse (2221011), we get a palindrome (13233231).

It can be divided in two parts, 1101 and 2220, that added together give a triangular number (3321 = T₈₁).

The spelling of 11012220 in words is "eleven million, twelve thousand, two hundred twenty".