123031320209 has 8 divisors (see below), whose sum is σ = 140686097280. Its totient is φ = 105396261696.

The previous prime is 123031320197. The next prime is 123031320221. The reversal of 123031320209 is 902023130321.

It is an interprime number because it is at equal distance from previous prime (123031320197) and next prime (123031320221).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123031320209 - 2²⁰ = 123030271633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123031320259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4916264 + ... + 4941225.

It is an arithmetic number, because the mean of its divisors is an integer number (17585762160).

Almost surely, 2^123031320209 is an apocalyptic number.

It is an amenable number.

123031320209 is a deficient number, since it is larger than the sum of its proper divisors (17654777071).

123031320209 is an equidigital number, since it uses as much as digits as its factorization.

123031320209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9859279.

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

The spelling of 123031320209 in words is "one hundred twenty-three billion, thirty-one million, three hundred twenty thousand, two hundred nine".