111111122201 has 2 divisors, whose sum is σ = 111111122202. Its totient is φ = 111111122200.

The previous prime is 111111122197. The next prime is 111111122207. The reversal of 111111122201 is 102221111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105851971801 + 5259150400 = 325349^2 + 72520^2 .

It is a cyclic number.

It is not a de Polignac number, because 111111122201 - 2² = 111111122197 is a prime.

It is not a weakly prime, because it can be changed into another prime (111111122207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555561100 + 55555561101.

It is an arithmetic number, because the mean of its divisors is an integer number (55555561101).

Almost surely, 2^111111122201 is an apocalyptic number.

It is an amenable number.

111111122201 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111122201 is an equidigital number, since it uses as much as digits as its factorization.

111111122201 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 14.

Adding to 111111122201 its reverse (102221111111), we get a palindrome (213332233312).

The spelling of 111111122201 in words is "one hundred eleven billion, one hundred eleven million, one hundred twenty-two thousand, two hundred one".