221020424323 has 2 divisors, whose sum is σ = 221020424324. Its totient is φ = 221020424322.

The previous prime is 221020424321. The next prime is 221020424329. The reversal of 221020424323 is 323424020122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221020424323 - 2¹ = 221020424321 is a prime.

Together with 221020424321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221020424321) 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, 110510212161 + 110510212162.

It is an arithmetic number, because the mean of its divisors is an integer number (110510212162).

Almost surely, 2^221020424323 is an apocalyptic number.

221020424323 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020424323 is an equidigital number, since it uses as much as digits as its factorization.

221020424323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 221020424323 its reverse (323424020122), we get a palindrome (544444444445).

The spelling of 221020424323 in words is "two hundred twenty-one billion, twenty million, four hundred twenty-four thousand, three hundred twenty-three".