221114321 has 2 divisors, whose sum is σ = 221114322. Its totient is φ = 221114320.

The previous prime is 221114317. The next prime is 221114329. The reversal of 221114321 is 123411122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111598096 + 109516225 = 10564^2 + 10465^2 .

It is a cyclic number.

It is not a de Polignac number, because 221114321 - 2² = 221114317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221114321.

It is not a weakly prime, because it can be changed into another prime (221114329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110557160 + 110557161.

It is an arithmetic number, because the mean of its divisors is an integer number (110557161).

Almost surely, 2^221114321 is an apocalyptic number.

It is an amenable number.

221114321 is a deficient number, since it is larger than the sum of its proper divisors (1).

221114321 is an equidigital number, since it uses as much as digits as its factorization.

221114321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96, while the sum is 17.

The square root of 221114321 is about 14869.9132815225. The cubic root of 221114321 is about 604.6985917539.

Adding to 221114321 its reverse (123411122), we get a palindrome (344525443).

The spelling of 221114321 in words is "two hundred twenty-one million, one hundred fourteen thousand, three hundred twenty-one".