221002209947 has 2 divisors, whose sum is σ = 221002209948. Its totient is φ = 221002209946.

The previous prime is 221002209919. The next prime is 221002210031. The reversal of 221002209947 is 749902200122.

221002209947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221002209947 - 2⁸ = 221002209691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221002209947.

It is not a weakly prime, because it can be changed into another prime (221002209907) 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, 110501104973 + 110501104974.

It is an arithmetic number, because the mean of its divisors is an integer number (110501104974).

Almost surely, 2^221002209947 is an apocalyptic number.

221002209947 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002209947 is an equidigital number, since it uses as much as digits as its factorization.

221002209947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 221002209947 in words is "two hundred twenty-one billion, two million, two hundred nine thousand, nine hundred forty-seven".