22120211220 has 24 divisors (see below), whose sum is σ = 61936591584. Its totient is φ = 5898722976.

The previous prime is 22120211213. The next prime is 22120211263. The reversal of 22120211220 is 2211202122.

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 22120211220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184335034 + ... + 184335153.

It is an arithmetic number, because the mean of its divisors is an integer number (2580691316).

Almost surely, 2^22120211220 is an apocalyptic number.

22120211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120211220 is an abundant number, since it is smaller than the sum of its proper divisors (39816380364).

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

22120211220 is a wasteful number, since it uses less digits than its factorization.

22120211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368670199 (or 368670197 counting only the distinct ones).

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

Adding to 22120211220 its reverse (2211202122), we get a palindrome (24331413342).

The spelling of 22120211220 in words is "twenty-two billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty".