123111300289 has 2 divisors, whose sum is σ = 123111300290. Its totient is φ = 123111300288.

The previous prime is 123111300271. The next prime is 123111300373. The reversal of 123111300289 is 982003111321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121098432064 + 2012868225 = 347992^2 + 44865^2 .

It is a cyclic number.

It is not a de Polignac number, because 123111300289 - 2²¹ = 123109203137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123111300289.

It is not a weakly prime, because it can be changed into another prime (123111300209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555650144 + 61555650145.

It is an arithmetic number, because the mean of its divisors is an integer number (61555650145).

Almost surely, 2^123111300289 is an apocalyptic number.

It is an amenable number.

123111300289 is a deficient number, since it is larger than the sum of its proper divisors (1).

123111300289 is an equidigital number, since it uses as much as digits as its factorization.

123111300289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 123111300289 in words is "one hundred twenty-three billion, one hundred eleven million, three hundred thousand, two hundred eighty-nine".