22121333 has 4 divisors (see below), whose sum is σ = 23822988. Its totient is φ = 20419680.

The previous prime is 22121329. The next prime is 22121347. The reversal of 22121333 is 33312122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14760964 + 7360369 = 3842^2 + 2713^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121333 - 2² = 22121329 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121303) 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 3 ways as a sum of consecutive naturals, for example, 850808 + ... + 850833.

It is an arithmetic number, because the mean of its divisors is an integer number (5955747).

Almost surely, 2^22121333 is an apocalyptic number.

It is an amenable number.

22121333 is a deficient number, since it is larger than the sum of its proper divisors (1701655).

22121333 is a wasteful number, since it uses less digits than its factorization.

22121333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701654.

The product of its digits is 216, while the sum is 17.

The square root of 22121333 is about 4703.3321167019. The cubic root of 22121333 is about 280.7181099358.

Adding to 22121333 its reverse (33312122), we get a palindrome (55433455).

The spelling of 22121333 in words is "twenty-two million, one hundred twenty-one thousand, three hundred thirty-three".