42104142221 has 2 divisors, whose sum is σ = 42104142222. Its totient is φ = 42104142220.

The previous prime is 42104142203. The next prime is 42104142239. The reversal of 42104142221 is 12224140124.

It is a balanced prime because it is at equal distance from previous prime (42104142203) and next prime (42104142239).

It can be written as a sum of positive squares in only one way, i.e., 42092677225 + 11464996 = 205165^2 + 3386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42104142221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42104145221) 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, 21052071110 + 21052071111.

It is an arithmetic number, because the mean of its divisors is an integer number (21052071111).

Almost surely, 2^42104142221 is an apocalyptic number.

It is an amenable number.

42104142221 is a deficient number, since it is larger than the sum of its proper divisors (1).

42104142221 is an equidigital number, since it uses as much as digits as its factorization.

42104142221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 42104142221 its reverse (12224140124), we get a palindrome (54328282345).

The spelling of 42104142221 in words is "forty-two billion, one hundred four million, one hundred forty-two thousand, two hundred twenty-one".