2221266120 has 32 divisors (see below), whose sum is σ = 6663798720. Its totient is φ = 592337600.

The previous prime is 2221266083. The next prime is 2221266127. The reversal of 2221266120 is 216621222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2221266127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9255156 + ... + 9255395.

It is an arithmetic number, because the mean of its divisors is an integer number (208243710).

Almost surely, 2^2221266120 is an apocalyptic number.

2221266120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221266120 is an abundant number, since it is smaller than the sum of its proper divisors (4442532600).

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

2221266120 is a wasteful number, since it uses less digits than its factorization.

2221266120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18510565 (or 18510561 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2221266120 is about 47130.3099926152. The cubic root of 2221266120 is about 1304.7687028604.

Adding to 2221266120 its reverse (216621222), we get a palindrome (2437887342).

The spelling of 2221266120 in words is "two billion, two hundred twenty-one million, two hundred sixty-six thousand, one hundred twenty".