21232233223231 has 2 divisors, whose sum is σ = 21232233223232. Its totient is φ = 21232233223230.

The previous prime is 21232233223193. The next prime is 21232233223237. The reversal of 21232233223231 is 13232233223212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21232233223231 - 2¹⁷ = 21232233092159 is a prime.

It is a super-4 number, since 4×21232233223231⁴ (a number of 54 digits) contains 4444 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 = 21232233223193 and 21232233223202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21232233223237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616116611615 + 10616116611616.

It is an arithmetic number, because the mean of its divisors is an integer number (10616116611616).

Almost surely, 2^{21232233223231} is an apocalyptic number.

21232233223231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232233223231 is an equidigital number, since it uses as much as digits as its factorization.

21232233223231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 31.

Adding to 21232233223231 its reverse (13232233223212), we get a palindrome (34464466446443).

The spelling of 21232233223231 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred thirty-three million, two hundred twenty-three thousand, two hundred thirty-one".