22031221231 has 2 divisors, whose sum is σ = 22031221232. Its totient is φ = 22031221230.

The previous prime is 22031221193. The next prime is 22031221243. The reversal of 22031221231 is 13212213022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22031221231 - 2¹⁵ = 22031188463 is a prime.

It is a super-3 number, since 3×22031221231³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 22031221199 and 22031221208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22031221271) 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 as a sum of consecutive naturals, namely, 11015610615 + 11015610616.

It is an arithmetic number, because the mean of its divisors is an integer number (11015610616).

Almost surely, 2^22031221231 is an apocalyptic number.

22031221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031221231 is an equidigital number, since it uses as much as digits as its factorization.

22031221231 is an odious number, because the sum of its binary digits is odd.

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

Adding to 22031221231 its reverse (13212213022), we get a palindrome (35243434253).

The spelling of 22031221231 in words is "twenty-two billion, thirty-one million, two hundred twenty-one thousand, two hundred thirty-one".