221303331312347 has 2 divisors, whose sum is σ = 221303331312348. Its totient is φ = 221303331312346.

The previous prime is 221303331312281. The next prime is 221303331312383. The reversal of 221303331312347 is 743213133303122.

221303331312347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221303331312347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221303331312347.

It is not a weakly prime, because it can be changed into another prime (221303339312347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110651665656173 + 110651665656174.

It is an arithmetic number, because the mean of its divisors is an integer number (110651665656174).

Almost surely, 2^{221303331312347} is an apocalyptic number.

221303331312347 is a deficient number, since it is larger than the sum of its proper divisors (1).

221303331312347 is an equidigital number, since it uses as much as digits as its factorization.

221303331312347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 38.

Adding to 221303331312347 its reverse (743213133303122), we get a palindrome (964516464615469).

The spelling of 221303331312347 in words is "two hundred twenty-one trillion, three hundred three billion, three hundred thirty-one million, three hundred twelve thousand, three hundred forty-seven".