221424343235 has 4 divisors (see below), whose sum is σ = 265709211888. Its totient is φ = 177139474584.

The previous prime is 221424343223. The next prime is 221424343267. The reversal of 221424343235 is 532343424122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221424343235 - 2¹⁰ = 221424342211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221424343195 and 221424343204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22142434319 + ... + 22142434328.

It is an arithmetic number, because the mean of its divisors is an integer number (66427302972).

Almost surely, 2^221424343235 is an apocalyptic number.

221424343235 is a deficient number, since it is larger than the sum of its proper divisors (44284868653).

221424343235 is an equidigital number, since it uses as much as digits as its factorization.

221424343235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44284868652.

The product of its digits is 138240, while the sum is 35.

Adding to 221424343235 its reverse (532343424122), we get a palindrome (753767767357).

The spelling of 221424343235 in words is "two hundred twenty-one billion, four hundred twenty-four million, three hundred forty-three thousand, two hundred thirty-five".