42231120234221 has 2 divisors, whose sum is σ = 42231120234222. Its totient is φ = 42231120234220.

The previous prime is 42231120234169. The next prime is 42231120234223. The reversal of 42231120234221 is 12243202113224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31816526296996 + 10414593937225 = 5640614^2 + 3227165^2 .

It is a cyclic number.

It is not a de Polignac number, because 42231120234221 - 2⁶ = 42231120234157 is a prime.

It is a super-3 number, since 3×42231120234221³ (a number of 42 digits) contains 333 as substring.

Together with 42231120234223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42231120234223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21115560117110 + 21115560117111.

It is an arithmetic number, because the mean of its divisors is an integer number (21115560117111).

Almost surely, 2^{42231120234221} is an apocalyptic number.

It is an amenable number.

42231120234221 is a deficient number, since it is larger than the sum of its proper divisors (1).

42231120234221 is an equidigital number, since it uses as much as digits as its factorization.

42231120234221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 42231120234221 its reverse (12243202113224), we get a palindrome (54474322347445).

The spelling of 42231120234221 in words is "forty-two trillion, two hundred thirty-one billion, one hundred twenty million, two hundred thirty-four thousand, two hundred twenty-one".