222201001220 has 96 divisors (see below), whose sum is σ = 511563064320. Its totient is φ = 80401282560.

The previous prime is 222201001189. The next prime is 222201001237. The reversal of 222201001220 is 22100102222.

It is a junction number, because it is equal to n+sod(n) for n = 222201001195 and 222201001204.

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, 39303914 + ... + 39309566.

It is an arithmetic number, because the mean of its divisors is an integer number (5328781920).

Almost surely, 2^222201001220 is an apocalyptic number.

222201001220 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 222201001220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255781532160).

222201001220 is an abundant number, since it is smaller than the sum of its proper divisors (289362063100).

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

222201001220 is a wasteful number, since it uses less digits than its factorization.

222201001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6525 (or 6523 counting only the distinct ones).

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

Adding to 222201001220 its reverse (22100102222), we get a palindrome (244301103442).

The spelling of 222201001220 in words is "two hundred twenty-two billion, two hundred one million, one thousand, two hundred twenty".