42331412112221 has 2 divisors, whose sum is σ = 42331412112222. Its totient is φ = 42331412112220.

The previous prime is 42331412112217. The next prime is 42331412112233. The reversal of 42331412112221 is 12221121413324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35851485487321 + 6479926624900 = 5987611^2 + 2545570^2 .

It is a cyclic number.

It is not a de Polignac number, because 42331412112221 - 2² = 42331412112217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42331412112251) 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, 21165706056110 + 21165706056111.

It is an arithmetic number, because the mean of its divisors is an integer number (21165706056111).

Almost surely, 2^{42331412112221} is an apocalyptic number.

It is an amenable number.

42331412112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

42331412112221 is an equidigital number, since it uses as much as digits as its factorization.

42331412112221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

Adding to 42331412112221 its reverse (12221121413324), we get a palindrome (54552533525545).

The spelling of 42331412112221 in words is "forty-two trillion, three hundred thirty-one billion, four hundred twelve million, one hundred twelve thousand, two hundred twenty-one".