2201122220 has 48 divisors (see below), whose sum is σ = 5053835808. Its totient is φ = 798620160.

The previous prime is 2201122219. The next prime is 2201122229. The reversal of 2201122220 is 222211022.

It is a junction number, because it is equal to n+sod(n) for n = 2201122195 and 2201122204.

It is not an unprimeable number, because it can be changed into a prime (2201122229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89594 + ... + 111486.

It is an arithmetic number, because the mean of its divisors is an integer number (105288246).

Almost surely, 2^2201122220 is an apocalyptic number.

2201122220 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 2201122220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2526917904).

2201122220 is an abundant number, since it is smaller than the sum of its proper divisors (2852713588).

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

2201122220 is a wasteful number, since it uses less digits than its factorization.

2201122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22370 (or 22368 counting only the distinct ones).

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

The square root of 2201122220 is about 46916.1189784492. The cubic root of 2201122220 is about 1300.8125531592.

Adding to 2201122220 its reverse (222211022), we get a palindrome (2423333242).

It can be divided in two parts, 2201 and 122220, that added together give a palindrome (124421).

The spelling of 2201122220 in words is "two billion, two hundred one million, one hundred twenty-two thousand, two hundred twenty".