221434430143 has 2 divisors, whose sum is σ = 221434430144. Its totient is φ = 221434430142.

The previous prime is 221434430141. The next prime is 221434430149. The reversal of 221434430143 is 341034434122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221434430143 - 2¹ = 221434430141 is a prime.

Together with 221434430141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221434430141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110717215071 + 110717215072.

It is an arithmetic number, because the mean of its divisors is an integer number (110717215072).

Almost surely, 2^221434430143 is an apocalyptic number.

221434430143 is a deficient number, since it is larger than the sum of its proper divisors (1).

221434430143 is an equidigital number, since it uses as much as digits as its factorization.

221434430143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 221434430143 its reverse (341034434122), we get a palindrome (562468864265).

The spelling of 221434430143 in words is "two hundred twenty-one billion, four hundred thirty-four million, four hundred thirty thousand, one hundred forty-three".