111212201 has 2 divisors, whose sum is σ = 111212202. Its totient is φ = 111212200.

The previous prime is 111212177. The next prime is 111212203. The reversal of 111212201 is 102212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95570176 + 15642025 = 9776^2 + 3955^2 .

It is an emirp because it is prime and its reverse (102212111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111212201 - 2¹⁴ = 111195817 is a prime.

Together with 111212203, 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 (111212203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606100 + 55606101.

It is an arithmetic number, because the mean of its divisors is an integer number (55606101).

Almost surely, 2^111212201 is an apocalyptic number.

It is an amenable number.

111212201 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212201 is an equidigital number, since it uses as much as digits as its factorization.

111212201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 111212201 is about 10545.7195581904. The cubic root of 111212201 is about 480.8956094245.

Adding to 111212201 its reverse (102212111), we get a palindrome (213424312).

The spelling of 111212201 in words is "one hundred eleven million, two hundred twelve thousand, two hundred one".