22201001220 has 48 divisors (see below), whose sum is σ = 63842885568. Its totient is φ = 5760259200.

The previous prime is 22201001189. The next prime is 22201001227. The reversal of 22201001220 is 2210010222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22201001196 and 22201001205.

It is not an unprimeable number, because it can be changed into a prime (22201001227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4998006 + ... + 5002445.

It is an arithmetic number, because the mean of its divisors is an integer number (1330060116).

Almost surely, 2^22201001220 is an apocalyptic number.

22201001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22201001220 is an abundant number, since it is smaller than the sum of its proper divisors (41641884348).

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

22201001220 is a wasteful number, since it uses less digits than its factorization.

22201001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000500 (or 10000498 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 22201001220 its reverse (2210010222), we get a palindrome (24411011442).

The spelling of 22201001220 in words is "twenty-two billion, two hundred one million, one thousand, two hundred twenty".