231209999999 has 8 divisors (see below), whose sum is σ = 252603882192. Its totient is φ = 209878583040.

The previous prime is 231209999903. The next prime is 231210000017. The reversal of 231209999999 is 999999902132.

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 231209999999 - 2³² = 226915032703 is a prime.

It is a Duffinian number.

231209999999 is a modest number, since divided by 999999 gives 231209 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231209999299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15608564 + ... + 15623369.

It is an arithmetic number, because the mean of its divisors is an integer number (31575485274).

Almost surely, 2^231209999999 is an apocalyptic number.

231209999999 is a deficient number, since it is larger than the sum of its proper divisors (21393882193).

231209999999 is a wasteful number, since it uses less digits than its factorization.

231209999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31232617.

The product of its (nonzero) digits is 57395628, while the sum is 71.

The spelling of 231209999999 in words is "two hundred thirty-one billion, two hundred nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".