123111213193 has 2 divisors, whose sum is σ = 123111213194. Its totient is φ = 123111213192.

The previous prime is 123111213083. The next prime is 123111213227. The reversal of 123111213193 is 391312111321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109801437769 + 13309775424 = 331363^2 + 115368^2 .

It is an emirp because it is prime and its reverse (391312111321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123111213193 - 2²⁵ = 123077658761 is a prime.

It is not a weakly prime, because it can be changed into another prime (123111213893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555606596 + 61555606597.

It is an arithmetic number, because the mean of its divisors is an integer number (61555606597).

Almost surely, 2^123111213193 is an apocalyptic number.

It is an amenable number.

123111213193 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111213193 is an equidigital number, since it uses as much as digits as its factorization.

123111213193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 28.

The spelling of 123111213193 in words is "one hundred twenty-three billion, one hundred eleven million, two hundred thirteen thousand, one hundred ninety-three".