201111243310123 has 2 divisors, whose sum is σ = 201111243310124. Its totient is φ = 201111243310122.

The previous prime is 201111243310069. The next prime is 201111243310169. The reversal of 201111243310123 is 321013342111102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201111243310123 - 2⁹ = 201111243309611 is a prime.

It is not a weakly prime, because it can be changed into another prime (201111243310193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555621655061 + 100555621655062.

It is an arithmetic number, because the mean of its divisors is an integer number (100555621655062).

Almost surely, 2^{201111243310123} is an apocalyptic number.

201111243310123 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111243310123 is an equidigital number, since it uses as much as digits as its factorization.

201111243310123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 201111243310123 its reverse (321013342111102), we get a palindrome (522124585421225).

The spelling of 201111243310123 in words is "two hundred one trillion, one hundred eleven billion, two hundred forty-three million, three hundred ten thousand, one hundred twenty-three".