221221116143 has 2 divisors, whose sum is σ = 221221116144. Its totient is φ = 221221116142.

The previous prime is 221221116133. The next prime is 221221116163. The reversal of 221221116143 is 341611122122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221221116143 - 2⁸ = 221221115887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221221116113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610558071 + 110610558072.

It is an arithmetic number, because the mean of its divisors is an integer number (110610558072).

Almost surely, 2^221221116143 is an apocalyptic number.

221221116143 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221116143 is an equidigital number, since it uses as much as digits as its factorization.

221221116143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

Adding to 221221116143 its reverse (341611122122), we get a palindrome (562832238265).

The spelling of 221221116143 in words is "two hundred twenty-one billion, two hundred twenty-one million, one hundred sixteen thousand, one hundred forty-three".