231240020012 has 24 divisors (see below), whose sum is σ = 414607359936. Its totient is φ = 112787610768.

The previous prime is 231240019991. The next prime is 231240020017. The reversal of 231240020012 is 210020042132.

It is not an unprimeable number, because it can be changed into a prime (231240020017) 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, 718778 + ... + 989505.

It is an arithmetic number, because the mean of its divisors is an integer number (17275306664).

Almost surely, 2^231240020012 is an apocalyptic number.

It is an amenable number.

231240020012 is a deficient number, since it is larger than the sum of its proper divisors (183367339924).

231240020012 is a wasteful number, since it uses less digits than its factorization.

231240020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709117 (or 1709115 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 231240020012 its reverse (210020042132), we get a palindrome (441260062144).

The spelling of 231240020012 in words is "two hundred thirty-one billion, two hundred forty million, twenty thousand, twelve".