123200120009 has 4 divisors (see below), whose sum is σ = 123435684816. Its totient is φ = 122964555204.

The previous prime is 123200119981. The next prime is 123200120027. The reversal of 123200120009 is 900021002321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123200120009 - 2⁸ = 123200119753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123200120059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117781619 + ... + 117782664.

It is an arithmetic number, because the mean of its divisors is an integer number (30858921204).

Almost surely, 2^123200120009 is an apocalyptic number.

It is an amenable number.

123200120009 is a deficient number, since it is larger than the sum of its proper divisors (235564807).

123200120009 is an equidigital number, since it uses as much as digits as its factorization.

123200120009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235564806.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 123200120009 in words is "one hundred twenty-three billion, two hundred million, one hundred twenty thousand, nine".