221000403411643 has 2 divisors, whose sum is σ = 221000403411644. Its totient is φ = 221000403411642.

The previous prime is 221000403411611. The next prime is 221000403411673. The reversal of 221000403411643 is 346114304000122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221000403411643 - 2⁵ = 221000403411611 is a prime.

It is not a weakly prime, because it can be changed into another prime (221000403411673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500201705821 + 110500201705822.

It is an arithmetic number, because the mean of its divisors is an integer number (110500201705822).

Almost surely, 2^{221000403411643} is an apocalyptic number.

221000403411643 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000403411643 is an equidigital number, since it uses as much as digits as its factorization.

221000403411643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 221000403411643 its reverse (346114304000122), we get a palindrome (567114707411765).

The spelling of 221000403411643 in words is "two hundred twenty-one trillion, four hundred three million, four hundred eleven thousand, six hundred forty-three".