221234332273 has 2 divisors, whose sum is σ = 221234332274. Its totient is φ = 221234332272.

The previous prime is 221234332247. The next prime is 221234332279. The reversal of 221234332273 is 372233432122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172078121329 + 49156210944 = 414823^2 + 221712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221234332273 is a prime.

It is not a weakly prime, because it can be changed into another prime (221234332279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110617166136 + 110617166137.

It is an arithmetic number, because the mean of its divisors is an integer number (110617166137).

Almost surely, 2^221234332273 is an apocalyptic number.

It is an amenable number.

221234332273 is a deficient number, since it is larger than the sum of its proper divisors (1).

221234332273 is an equidigital number, since it uses as much as digits as its factorization.

221234332273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 34.

Adding to 221234332273 its reverse (372233432122), we get a palindrome (593467764395).

The spelling of 221234332273 in words is "two hundred twenty-one billion, two hundred thirty-four million, three hundred thirty-two thousand, two hundred seventy-three".