2228181121 has 8 divisors (see below), whose sum is σ = 2302731144. Its totient is φ = 2154593280.

The previous prime is 2228181113. The next prime is 2228181169. The reversal of 2228181121 is 1211818222.

It can be written as a sum of positive squares in 4 ways, for example, as 43086096 + 2185095025 = 6564^2 + 46745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2228181121 - 2³ = 2228181113 is a prime.

It is a super-2 number, since 2×2228181121² = 9929582215961633282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2228181121.

It is not an unprimeable number, because it can be changed into a prime (2228181101) 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, 235836 + ... + 245101.

It is an arithmetic number, because the mean of its divisors is an integer number (287841393).

Almost surely, 2^2228181121 is an apocalyptic number.

It is an amenable number.

2228181121 is a deficient number, since it is larger than the sum of its proper divisors (74550023).

2228181121 is a wasteful number, since it uses less digits than its factorization.

2228181121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481091.

The product of its digits is 1024, while the sum is 28.

The square root of 2228181121 is about 47203.6134316008. The cubic root of 2228181121 is about 1306.1212543578.

Adding to 2228181121 its reverse (1211818222), we get a palindrome (3439999343).

The spelling of 2228181121 in words is "two billion, two hundred twenty-eight million, one hundred eighty-one thousand, one hundred twenty-one".