123012203309 has 2 divisors, whose sum is σ = 123012203310. Its totient is φ = 123012203308.

The previous prime is 123012203273. The next prime is 123012203311. The reversal of 123012203309 is 903302210321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110147653225 + 12864550084 = 331885^2 + 113422^2 .

It is a cyclic number.

It is not a de Polignac number, because 123012203309 - 2¹² = 123012199213 is a prime.

Together with 123012203311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123012203359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61506101654 + 61506101655.

It is an arithmetic number, because the mean of its divisors is an integer number (61506101655).

Almost surely, 2^123012203309 is an apocalyptic number.

It is an amenable number.

123012203309 is a deficient number, since it is larger than the sum of its proper divisors (1).

123012203309 is an equidigital number, since it uses as much as digits as its factorization.

123012203309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 26.

The spelling of 123012203309 in words is "one hundred twenty-three billion, twelve million, two hundred three thousand, three hundred nine".