11220500 has 24 divisors (see below), whose sum is σ = 24506664. Its totient is φ = 4488000.

The previous prime is 11220491. The next prime is 11220533. The reversal of 11220500 is 502211.

It can be written as a sum of positive squares in 4 ways, for example, as 2729104 + 8491396 = 1652^2 + 2914^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10721 + ... + 11720.

It is an arithmetic number, because the mean of its divisors is an integer number (1021111).

Almost surely, 2^11220500 is an apocalyptic number.

11220500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220500 is an abundant number, since it is smaller than the sum of its proper divisors (13286164).

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

11220500 is a wasteful number, since it uses less digits than its factorization.

11220500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22460 (or 22448 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 11220500 is about 3349.7014792366. The cubic root of 11220500 is about 223.8742119019.

Adding to 11220500 its reverse (502211), we get a palindrome (11722711).

The spelling of 11220500 in words is "eleven million, two hundred twenty thousand, five hundred".