2210221220 has 24 divisors (see below), whose sum is σ = 4645644864. Its totient is φ = 883292256.

The previous prime is 2210221217. The next prime is 2210221241. The reversal of 2210221220 is 221220122.

It is a junction number, because it is equal to n+sod(n) for n = 2210221195 and 2210221204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26744 + ... + 71663.

It is an arithmetic number, because the mean of its divisors is an integer number (193568536).

Almost surely, 2^2210221220 is an apocalyptic number.

2210221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2210221220 is an abundant number, since it is smaller than the sum of its proper divisors (2435423644).

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

2210221220 is a wasteful number, since it uses less digits than its factorization.

2210221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99539 (or 99537 counting only the distinct ones).

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

The square root of 2210221220 is about 47012.9899070459. The cubic root of 2210221220 is about 1302.6025221300.

Adding to 2210221220 its reverse (221220122), we get a palindrome (2431441342).

The spelling of 2210221220 in words is "two billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty".