111122222201 has 2 divisors, whose sum is σ = 111122222202. Its totient is φ = 111122222200.

The previous prime is 111122222177. The next prime is 111122222221. The reversal of 111122222201 is 102222221111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73611829225 + 37510392976 = 271315^2 + 193676^2 .

It is a cyclic number.

It is not a de Polignac number, because 111122222201 - 2³⁴ = 93942353017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111122222201.

It is not a weakly prime, because it can be changed into another prime (111122222221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561111100 + 55561111101.

It is an arithmetic number, because the mean of its divisors is an integer number (55561111101).

Almost surely, 2^111122222201 is an apocalyptic number.

It is an amenable number.

111122222201 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122222201 is an equidigital number, since it uses as much as digits as its factorization.

111122222201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 111122222201 its reverse (102222221111), we get a palindrome (213344443312).

The spelling of 111122222201 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred one".