111221141 has 2 divisors, whose sum is σ = 111221142. Its totient is φ = 111221140.

The previous prime is 111221101. The next prime is 111221153. The reversal of 111221141 is 141122111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111218116 + 3025 = 10546^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221141 - 2¹⁰ = 111220117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610570 + 55610571.

It is an arithmetic number, because the mean of its divisors is an integer number (55610571).

Almost surely, 2^111221141 is an apocalyptic number.

It is an amenable number.

111221141 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221141 is an equidigital number, since it uses as much as digits as its factorization.

111221141 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 111221141 is about 10546.1434183307. The cubic root of 111221141 is about 480.9084949758.

Adding to 111221141 its sum of digits (14), we get a triangular number (111221155 = T₁₄₉₁₄).

Adding to 111221141 its reverse (141122111), we get a palindrome (252343252).

The spelling of 111221141 in words is "one hundred eleven million, two hundred twenty-one thousand, one hundred forty-one".