22201021220 has 96 divisors (see below), whose sum is σ = 53656162560. Its totient is φ = 7558594560.

The previous prime is 22201021177. The next prime is 22201021231. The reversal of 22201021220 is 2212010222.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 22201021195 and 22201021204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15755876 + ... + 15757284.

It is an arithmetic number, because the mean of its divisors is an integer number (558918360).

Almost surely, 2^22201021220 is an apocalyptic number.

22201021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22201021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26828081280).

22201021220 is an abundant number, since it is smaller than the sum of its proper divisors (31455141340).

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

22201021220 is a wasteful number, since it uses less digits than its factorization.

22201021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2133 (or 2131 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22201021220 its reverse (2212010222), we get a palindrome (24413031442).

The spelling of 22201021220 in words is "twenty-two billion, two hundred one million, twenty-one thousand, two hundred twenty".