220111321 has 2 divisors, whose sum is σ = 220111322. Its totient is φ = 220111320.

The previous prime is 220111319. The next prime is 220111327. The reversal of 220111321 is 123111022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 172003225 + 48108096 = 13115^2 + 6936^2 .

It is a cyclic number.

It is not a de Polignac number, because 220111321 - 2¹ = 220111319 is a prime.

Together with 220111319, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220111327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055660 + 110055661.

It is an arithmetic number, because the mean of its divisors is an integer number (110055661).

Almost surely, 2^220111321 is an apocalyptic number.

It is an amenable number.

220111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111321 is an equidigital number, since it uses as much as digits as its factorization.

220111321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 220111321 is about 14836.1491297439. The cubic root of 220111321 is about 603.7828782996.

Adding to 220111321 its reverse (123111022), we get a palindrome (343222343).

It can be divided in two parts, 22011 and 1321, that added together give a palindrome (23332).

The spelling of 220111321 in words is "two hundred twenty million, one hundred eleven thousand, three hundred twenty-one".