2211222220 has 24 divisors (see below), whose sum is σ = 4654666800. Its totient is φ = 882374592.

The previous prime is 2211222217. The next prime is 2211222227. The reversal of 2211222220 is 222221122.

It is a junction number, because it is equal to n+sod(n) for n = 2211222194 and 2211222203.

It is not an unprimeable number, because it can be changed into a prime (2211222227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123555 + ... + 140314.

It is an arithmetic number, because the mean of its divisors is an integer number (193944450).

Almost surely, 2^2211222220 is an apocalyptic number.

2211222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2211222220 is an abundant number, since it is smaller than the sum of its proper divisors (2443444580).

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

2211222220 is a wasteful number, since it uses less digits than its factorization.

2211222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264297 (or 264295 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2211222220 is about 47023.6346957570. The cubic root of 2211222220 is about 1302.7991402058.

Adding to 2211222220 its reverse (222221122), we get a palindrome (2433443342).

The spelling of 2211222220 in words is "two billion, two hundred eleven million, two hundred twenty-two thousand, two hundred twenty".