42341221243 has 2 divisors, whose sum is σ = 42341221244. Its totient is φ = 42341221242.

The previous prime is 42341221231. The next prime is 42341221267. The reversal of 42341221243 is 34212214324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42341221243 is a prime.

It is not a weakly prime, because it can be changed into another prime (42341231243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21170610621 + 21170610622.

It is an arithmetic number, because the mean of its divisors is an integer number (21170610622).

Almost surely, 2^42341221243 is an apocalyptic number.

42341221243 is a deficient number, since it is larger than the sum of its proper divisors (1).

42341221243 is an equidigital number, since it uses as much as digits as its factorization.

42341221243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 28.

Adding to 42341221243 its reverse (34212214324), we get a palindrome (76553435567).

The spelling of 42341221243 in words is "forty-two billion, three hundred forty-one million, two hundred twenty-one thousand, two hundred forty-three".