22220201221220 has 12 divisors (see below), whose sum is σ = 46662422564604. Its totient is φ = 8888080488480.

The previous prime is 22220201221199. The next prime is 22220201221223. The reversal of 22220201221220 is 2212210202222.

It can be written as a sum of positive squares in 2 ways, for example, as 13984368826624 + 8235832394596 = 3739568^2 + 2869814^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1111010061061 = 22220201221220 / (2 + 2 + 2 + 2 + 0 + 2 + 0 + 1 + 2 + 2 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 22220201221192 and 22220201221201.

It is not an unprimeable number, because it can be changed into a prime (22220201221223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555505030511 + ... + 555505030550.

It is an arithmetic number, because the mean of its divisors is an integer number (3888535213717).

Almost surely, 2^{22220201221220} is an apocalyptic number.

22220201221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22220201221220 is an abundant number, since it is smaller than the sum of its proper divisors (24442221343384).

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

22220201221220 is a wasteful number, since it uses less digits than its factorization.

22220201221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111010061070 (or 1111010061068 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 22220201221220 its reverse (2212210202222), we get a palindrome (24432411423442).

The spelling of 22220201221220 in words is "twenty-two trillion, two hundred twenty billion, two hundred one million, two hundred twenty-one thousand, two hundred twenty".