221002021948867 has 2 divisors, whose sum is σ = 221002021948868. Its totient is φ = 221002021948866.

The previous prime is 221002021948853. The next prime is 221002021948871. The reversal of 221002021948867 is 768849120200122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002021948867 is a prime.

It is not a weakly prime, because it can be changed into another prime (221002021978867) 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, 110501010974433 + 110501010974434.

It is an arithmetic number, because the mean of its divisors is an integer number (110501010974434).

Almost surely, 2^{221002021948867} is an apocalyptic number.

221002021948867 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002021948867 is an equidigital number, since it uses as much as digits as its factorization.

221002021948867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 221002021948867 in words is "two hundred twenty-one trillion, two billion, twenty-one million, nine hundred forty-eight thousand, eight hundred sixty-seven".