42221727869 has 2 divisors, whose sum is σ = 42221727870. Its totient is φ = 42221727868.

The previous prime is 42221727841. The next prime is 42221727929. The reversal of 42221727869 is 96872712224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27107976025 + 15113751844 = 164645^2 + 122938^2 .

It is a cyclic number.

It is not a de Polignac number, because 42221727869 - 2¹² = 42221723773 is a prime.

It is a super-2 number, since 2×42221727869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42221727839) 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, 21110863934 + 21110863935.

It is an arithmetic number, because the mean of its divisors is an integer number (21110863935).

Almost surely, 2^42221727869 is an apocalyptic number.

It is an amenable number.

42221727869 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221727869 is an equidigital number, since it uses as much as digits as its factorization.

42221727869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The spelling of 42221727869 in words is "forty-two billion, two hundred twenty-one million, seven hundred twenty-seven thousand, eight hundred sixty-nine".