11220233220 has 72 divisors (see below), whose sum is σ = 38896812864. Its totient is φ = 2564624448.

The previous prime is 11220233207. The next prime is 11220233273. The reversal of 11220233220 is 2233202211.

11220233220 is a `hidden beast` number, since 112 + 202 + 332 + 20 = 666.

It is a super-2 number, since 2×11220233220² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11220233193 and 11220233202.

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, 4451214 + ... + 4453733.

It is an arithmetic number, because the mean of its divisors is an integer number (540233512).

Almost surely, 2^11220233220 is an apocalyptic number.

11220233220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220233220 is an abundant number, since it is smaller than the sum of its proper divisors (27676579644).

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

11220233220 is a wasteful number, since it uses less digits than its factorization.

11220233220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8904969 (or 8904964 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 11220233220 its reverse (2233202211), we get a palindrome (13453435431).

The spelling of 11220233220 in words is "eleven billion, two hundred twenty million, two hundred thirty-three thousand, two hundred twenty".