22221001202220 has 72 divisors (see below), whose sum is σ = 69225425387664. Its totient is φ = 5765448958848.

The previous prime is 22221001202189. The next prime is 22221001202227. The reversal of 22221001202220 is 2220210012222.

22221001202220 is a `hidden beast` number, since 2 + 222 + 100 + 120 + 2 + 220 = 666.

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 = 22221001202193 and 22221001202202.

It is not an unprimeable number, because it can be changed into a prime (22221001202227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1668236674 + ... + 1668249993.

Almost surely, 2^{22221001202220} is an apocalyptic number.

22221001202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22221001202220 is an abundant number, since it is smaller than the sum of its proper divisors (47004424185444).

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

22221001202220 is a wasteful number, since it uses less digits than its factorization.

22221001202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3336486719 (or 3336486714 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22221001202220 its reverse (2220210012222), we get a palindrome (24441211214442).

The spelling of 22221001202220 in words is "twenty-two trillion, two hundred twenty-one billion, one million, two hundred two thousand, two hundred twenty".