2221121233 has 8 divisors (see below), whose sum is σ = 2238677352. Its totient is φ = 2203608576.

The previous prime is 2221121173. The next prime is 2221121239. The reversal of 2221121233 is 3321211222.

It can be written as a sum of positive squares in 4 ways, for example, as 893830609 + 1327290624 = 29897^2 + 36432^2 .

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 2221121233 - 2⁹ = 2221120721 is a prime.

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 2221121233.

It is not an unprimeable number, because it can be changed into a prime (2221121239) 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, 95841 + ... + 116737.

It is an arithmetic number, because the mean of its divisors is an integer number (279834669).

Almost surely, 2^2221121233 is an apocalyptic number.

It is an amenable number.

2221121233 is a deficient number, since it is larger than the sum of its proper divisors (17556119).

2221121233 is a wasteful number, since it uses less digits than its factorization.

2221121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21731.

The product of its digits is 288, while the sum is 19.

The square root of 2221121233 is about 47128.7728781474. The cubic root of 2221121233 is about 1304.7403334345.

Adding to 2221121233 its reverse (3321211222), we get a palindrome (5542332455).

The spelling of 2221121233 in words is "two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirty-three".