221111141 has 2 divisors, whose sum is σ = 221111142. Its totient is φ = 221111140.

The previous prime is 221111131. The next prime is 221111159. The reversal of 221111141 is 141111122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209236225 + 11874916 = 14465^2 + 3446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221111141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221111131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555570 + 110555571.

It is an arithmetic number, because the mean of its divisors is an integer number (110555571).

Almost surely, 2^221111141 is an apocalyptic number.

It is an amenable number.

221111141 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111141 is an equidigital number, since it uses as much as digits as its factorization.

221111141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16, while the sum is 14.

The square root of 221111141 is about 14869.8063538164. The cubic root of 221111141 is about 604.6956928753.

Adding to 221111141 its reverse (141111122), we get a palindrome (362222263).

The spelling of 221111141 in words is "two hundred twenty-one million, one hundred eleven thousand, one hundred forty-one".