22033131221 has 32 divisors (see below), whose sum is σ = 24169736448. Its totient is φ = 20025308160.

The previous prime is 22033131209. The next prime is 22033131227. The reversal of 22033131221 is 12213133022.

It is a cyclic number.

It is not a de Polignac number, because 22033131221 - 2¹⁸ = 22032869077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22033131193 and 22033131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22033131227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10868810 + ... + 10870836.

It is an arithmetic number, because the mean of its divisors is an integer number (755304264).

Almost surely, 2^22033131221 is an apocalyptic number.

It is an amenable number.

22033131221 is a deficient number, since it is larger than the sum of its proper divisors (2136605227).

22033131221 is a wasteful number, since it uses less digits than its factorization.

22033131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 22033131221 its reverse (12213133022), we get a palindrome (34246264243).

The spelling of 22033131221 in words is "twenty-two billion, thirty-three million, one hundred thirty-one thousand, two hundred twenty-one".