22001122220 has 192 divisors, whose sum is σ = 62961131520. Its totient is φ = 6245683200.

The previous prime is 22001122211. The next prime is 22001122229. The reversal of 22001122220 is 2222110022.

It is an interprime number because it is at equal distance from previous prime (22001122211) and next prime (22001122229).

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 = 22001122195 and 22001122204.

It is not an unprimeable number, because it can be changed into a prime (22001122229) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 798026 + ... + 825134.

It is an arithmetic number, because the mean of its divisors is an integer number (327922560).

Almost surely, 2^22001122220 is an apocalyptic number.

22001122220 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 22001122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31480565760).

22001122220 is an abundant number, since it is smaller than the sum of its proper divisors (40960009300).

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

22001122220 is a wasteful number, since it uses less digits than its factorization.

22001122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27184 (or 27182 counting only the distinct ones).

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

Adding to 22001122220 its reverse (2222110022), we get a palindrome (24223232242).

The spelling of 22001122220 in words is "twenty-two billion, one million, one hundred twenty-two thousand, two hundred twenty".