201111122111201 has 2 divisors, whose sum is σ = 201111122111202. Its totient is φ = 201111122111200.

The previous prime is 201111122111173. The next prime is 201111122111227. The reversal of 201111122111201 is 102111221111102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188796805912225 + 12314316198976 = 13740335^2 + 3509176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201111122111201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201111122111201.

It is not a weakly prime, because it can be changed into another prime (201111122111261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555561055600 + 100555561055601.

It is an arithmetic number, because the mean of its divisors is an integer number (100555561055601).

Almost surely, 2^{201111122111201} is an apocalyptic number.

It is an amenable number.

201111122111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111122111201 is an equidigital number, since it uses as much as digits as its factorization.

201111122111201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 201111122111201 its reverse (102111221111102), we get a palindrome (303222343222303).

The spelling of 201111122111201 in words is "two hundred one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred eleven thousand, two hundred one".