42112231321 has 2 divisors, whose sum is σ = 42112231322. Its totient is φ = 42112231320.

The previous prime is 42112231307. The next prime is 42112231397. The reversal of 42112231321 is 12313221124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22947705225 + 19164526096 = 151485^2 + 138436^2 .

It is a cyclic number.

It is not a de Polignac number, because 42112231321 - 2³¹ = 39964747673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42112231292 and 42112231301.

It is not a weakly prime, because it can be changed into another prime (82112231321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21056115660 + 21056115661.

It is an arithmetic number, because the mean of its divisors is an integer number (21056115661).

Almost surely, 2^42112231321 is an apocalyptic number.

It is an amenable number.

42112231321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42112231321 is an equidigital number, since it uses as much as digits as its factorization.

42112231321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

Adding to 42112231321 its reverse (12313221124), we get a palindrome (54425452445).

The spelling of 42112231321 in words is "forty-two billion, one hundred twelve million, two hundred thirty-one thousand, three hundred twenty-one".