221222212209967 has 2 divisors, whose sum is σ = 221222212209968. Its totient is φ = 221222212209966.

The previous prime is 221222212209953. The next prime is 221222212210003. The reversal of 221222212209967 is 769902212222122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222212209967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221222212209967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221222212209367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611106104983 + 110611106104984.

It is an arithmetic number, because the mean of its divisors is an integer number (110611106104984).

Almost surely, 2^{221222212209967} is an apocalyptic number.

221222212209967 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222212209967 is an equidigital number, since it uses as much as digits as its factorization.

221222212209967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 221222212209967 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred nine thousand, nine hundred sixty-seven".