4226765267821 has 2 divisors, whose sum is σ = 4226765267822. Its totient is φ = 4226765267820.

The previous prime is 4226765267819. The next prime is 4226765267909. The reversal of 4226765267821 is 1287625676224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2835754960900 + 1391010306921 = 1683970^2 + 1179411^2 .

It is a cyclic number.

It is not a de Polignac number, because 4226765267821 - 2¹ = 4226765267819 is a prime.

Together with 4226765267819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4226765267521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2113382633910 + 2113382633911.

It is an arithmetic number, because the mean of its divisors is an integer number (2113382633911).

Almost surely, 2^{4226765267821} is an apocalyptic number.

It is an amenable number.

4226765267821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4226765267821 is an equidigital number, since it uses as much as digits as its factorization.

4226765267821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27095040, while the sum is 58.

The spelling of 4226765267821 in words is "four trillion, two hundred twenty-six billion, seven hundred sixty-five million, two hundred sixty-seven thousand, eight hundred twenty-one".