123011122309 has 2 divisors, whose sum is σ = 123011122310. Its totient is φ = 123011122308.

The previous prime is 123011122261. The next prime is 123011122313. The reversal of 123011122309 is 903221110321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93694149025 + 29316973284 = 306095^2 + 171222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123011122309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123011122109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61505561154 + 61505561155.

It is an arithmetic number, because the mean of its divisors is an integer number (61505561155).

Almost surely, 2^123011122309 is an apocalyptic number.

It is an amenable number.

123011122309 is a deficient number, since it is larger than the sum of its proper divisors (1).

123011122309 is an equidigital number, since it uses as much as digits as its factorization.

123011122309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 123011122309 in words is "one hundred twenty-three billion, eleven million, one hundred twenty-two thousand, three hundred nine".