123200431305 has 32 divisors (see below), whose sum is σ = 225334137600. Its totient is φ = 56306860032.

The previous prime is 123200431297. The next prime is 123200431309. The reversal of 123200431305 is 503134002321.

It is not a de Polignac number, because 123200431305 - 2³ = 123200431297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123200431309) 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 31 ways as a sum of consecutive naturals, for example, 313561 + ... + 587129.

It is an arithmetic number, because the mean of its divisors is an integer number (7041691800).

Almost surely, 2^123200431305 is an apocalyptic number.

123200431305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123200431305 is a deficient number, since it is larger than the sum of its proper divisors (102133706295).

123200431305 is a wasteful number, since it uses less digits than its factorization.

123200431305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277873.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 123200431305 its reverse (503134002321), we get a palindrome (626334433626).

The spelling of 123200431305 in words is "one hundred twenty-three billion, two hundred million, four hundred thirty-one thousand, three hundred five".