111212141 has 2 divisors, whose sum is σ = 111212142. Its totient is φ = 111212140.

The previous prime is 111212119. The next prime is 111212173. The reversal of 111212141 is 141212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109098025 + 2114116 = 10445^2 + 1454^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212141 - 2¹⁴ = 111195757 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 (111212041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606070 + 55606071.

It is an arithmetic number, because the mean of its divisors is an integer number (55606071).

Almost surely, 2^111212141 is an apocalyptic number.

It is an amenable number.

111212141 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212141 is an equidigital number, since it uses as much as digits as its factorization.

111212141 is an odious number, because the sum of its binary digits is odd.

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

The square root of 111212141 is about 10545.7167134339. The cubic root of 111212141 is about 480.8955229420.

Adding to 111212141 its reverse (141212111), we get a palindrome (252424252).

The spelling of 111212141 in words is "one hundred eleven million, two hundred twelve thousand, one hundred forty-one".