123130409999 has 4 divisors (see below), whose sum is σ = 125453625336. Its totient is φ = 120807194664.

The previous prime is 123130409957. The next prime is 123130410037. The reversal of 123130409999 is 999904031321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123130409999 - 2¹² = 123130405903 is a prime.

It is a super-2 number, since 2×123130409999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123130409299) 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, 1161607589 + ... + 1161607694.

It is an arithmetic number, because the mean of its divisors is an integer number (31363406334).

Almost surely, 2^123130409999 is an apocalyptic number.

123130409999 is a deficient number, since it is larger than the sum of its proper divisors (2323215337).

123130409999 is an equidigital number, since it uses as much as digits as its factorization.

123130409999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323215336.

The product of its (nonzero) digits is 472392, while the sum is 50.

The spelling of 123130409999 in words is "one hundred twenty-three billion, one hundred thirty million, four hundred nine thousand, nine hundred ninety-nine".