21227668883567 has 2 divisors, whose sum is σ = 21227668883568. Its totient is φ = 21227668883566.

The previous prime is 21227668883489. The next prime is 21227668883573. The reversal of 21227668883567 is 76538886672212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21227668883567 - 2¹⁰ = 21227668882543 is a prime.

It is a super-2 number, since 2×21227668883567² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21227668883567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21227668883867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10613834441783 + 10613834441784.

It is an arithmetic number, because the mean of its divisors is an integer number (10613834441784).

Almost surely, 2^{21227668883567} is an apocalyptic number.

21227668883567 is a deficient number, since it is larger than the sum of its proper divisors (1).

21227668883567 is an equidigital number, since it uses as much as digits as its factorization.

21227668883567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 650280960, while the sum is 71.

The spelling of 21227668883567 in words is "twenty-one trillion, two hundred twenty-seven billion, six hundred sixty-eight million, eight hundred eighty-three thousand, five hundred sixty-seven".