42774317221 has 2 divisors, whose sum is σ = 42774317222. Its totient is φ = 42774317220.

The previous prime is 42774317213. The next prime is 42774317237. The reversal of 42774317221 is 12271347724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28759072225 + 14015244996 = 169585^2 + 118386^2 .

It is a cyclic number.

It is not a de Polignac number, because 42774317221 - 2³ = 42774317213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42774317251) 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, 21387158610 + 21387158611.

It is an arithmetic number, because the mean of its divisors is an integer number (21387158611).

Almost surely, 2^42774317221 is an apocalyptic number.

It is an amenable number.

42774317221 is a deficient number, since it is larger than the sum of its proper divisors (1).

42774317221 is an equidigital number, since it uses as much as digits as its factorization.

42774317221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 40.

The spelling of 42774317221 in words is "forty-two billion, seven hundred seventy-four million, three hundred seventeen thousand, two hundred twenty-one".