11222021220 has 48 divisors (see below), whose sum is σ = 31438507968. Its totient is φ = 2990934400.

The previous prime is 11222021203. The next prime is 11222021233. The reversal of 11222021220 is 2212022211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11222021220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64867 + ... + 163253.

It is an arithmetic number, because the mean of its divisors is an integer number (654968916).

Almost surely, 2^11222021220 is an apocalyptic number.

11222021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11222021220 is an abundant number, since it is smaller than the sum of its proper divisors (20216486748).

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

11222021220 is a wasteful number, since it uses less digits than its factorization.

11222021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100300 (or 100298 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 11222021220 its reverse (2212022211), we get a palindrome (13434043431).

Subtracting from 11222021220 its reverse (2212022211), we obtain a palindrome (9009999009).

The spelling of 11222021220 in words is "eleven billion, two hundred twenty-two million, twenty-one thousand, two hundred twenty".