123312678911 has 2 divisors, whose sum is σ = 123312678912. Its totient is φ = 123312678910.

The previous prime is 123312678871. The next prime is 123312679027. The reversal of 123312678911 is 119876213321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123312678911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123312675911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61656339455 + 61656339456.

It is an arithmetic number, because the mean of its divisors is an integer number (61656339456).

Almost surely, 2^123312678911 is an apocalyptic number.

123312678911 is a deficient number, since it is larger than the sum of its proper divisors (1).

123312678911 is an equidigital number, since it uses as much as digits as its factorization.

123312678911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The spelling of 123312678911 in words is "one hundred twenty-three billion, three hundred twelve million, six hundred seventy-eight thousand, nine hundred eleven".