231321021112 has 16 divisors (see below), whose sum is σ = 436847254200. Its totient is φ = 114828420000.

The previous prime is 231321021109. The next prime is 231321021131. The reversal of 231321021112 is 211120123132.

It is a self number, because there is not a number n which added to its sum of digits gives 231321021112.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 104010139 + ... + 104012362.

Almost surely, 2^231321021112 is an apocalyptic number.

It is an amenable number.

231321021112 is a deficient number, since it is larger than the sum of its proper divisors (205526233088).

231321021112 is a wasteful number, since it uses less digits than its factorization.

231321021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208022646 (or 208022642 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231321021112 its reverse (211120123132), we get a palindrome (442441144244).

The spelling of 231321021112 in words is "two hundred thirty-one billion, three hundred twenty-one million, twenty-one thousand, one hundred twelve".