123012011117 has 2 divisors, whose sum is σ = 123012011118. Its totient is φ = 123012011116.

The previous prime is 123012011099. The next prime is 123012011137. The reversal of 123012011117 is 711110210321.

It is an a-pointer prime, because the next prime (123012011137) can be obtained adding 123012011117 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97727512996 + 25284498121 = 312614^2 + 159011^2 .

It is a cyclic number.

It is not a de Polignac number, because 123012011117 - 2²⁴ = 122995233901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012011137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506005558 + 61506005559.

It is an arithmetic number, because the mean of its divisors is an integer number (61506005559).

Almost surely, 2^123012011117 is an apocalyptic number.

It is an amenable number.

123012011117 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012011117 is an equidigital number, since it uses as much as digits as its factorization.

123012011117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 123012011117 its reverse (711110210321), we get a palindrome (834122221438).

The spelling of 123012011117 in words is "one hundred twenty-three billion, twelve million, eleven thousand, one hundred seventeen".