123331009939 has 2 divisors, whose sum is σ = 123331009940. Its totient is φ = 123331009938.

The previous prime is 123331009937. The next prime is 123331009957. The reversal of 123331009939 is 939900133321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123331009939 - 2¹ = 123331009937 is a prime.

Together with 123331009937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 123331009895 and 123331009904.

It is not a weakly prime, because it can be changed into another prime (123331009937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61665504969 + 61665504970.

It is an arithmetic number, because the mean of its divisors is an integer number (61665504970).

Almost surely, 2^123331009939 is an apocalyptic number.

123331009939 is a deficient number, since it is larger than the sum of its proper divisors (1).

123331009939 is an equidigital number, since it uses as much as digits as its factorization.

123331009939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 43.

The spelling of 123331009939 in words is "one hundred twenty-three billion, three hundred thirty-one million, nine thousand, nine hundred thirty-nine".