231021331233 has 16 divisors (see below), whose sum is σ = 384035460096. Its totient is φ = 120011081040.

The previous prime is 231021331223. The next prime is 231021331259. The reversal of 231021331233 is 332133120132.

231021331233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231021331233 - 2¹⁰ = 231021330209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231021331223) 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 15 ways as a sum of consecutive naturals, for example, 500045941 + ... + 500046402.

It is an arithmetic number, because the mean of its divisors is an integer number (24002216256).

Almost surely, 2^231021331233 is an apocalyptic number.

It is an amenable number.

231021331233 is a deficient number, since it is larger than the sum of its proper divisors (153014128863).

231021331233 is a wasteful number, since it uses less digits than its factorization.

231021331233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000092364.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 231021331233 its reverse (332133120132), we get a palindrome (563154451365).

The spelling of 231021331233 in words is "two hundred thirty-one billion, twenty-one million, three hundred thirty-one thousand, two hundred thirty-three".