231021330233 has 8 divisors (see below), whose sum is σ = 231375837000. Its totient is φ = 230667084288.

The previous prime is 231021330217. The next prime is 231021330247. The reversal of 231021330233 is 332033120132.

It can be written as a sum of positive squares in 4 ways, for example, as 39349863424 + 191671466809 = 198368^2 + 437803^2 .

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 231021330233 - 2⁴ = 231021330217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231021330199 and 231021330208.

It is not an unprimeable number, because it can be changed into a prime (231021336233) 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, 1745993 + ... + 1873641.

It is an arithmetic number, because the mean of its divisors is an integer number (28921979625).

Almost surely, 2^231021330233 is an apocalyptic number.

It is an amenable number.

231021330233 is a deficient number, since it is larger than the sum of its proper divisors (354506767).

231021330233 is a wasteful number, since it uses less digits than its factorization.

231021330233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130411.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 231021330233 its reverse (332033120132), we get a palindrome (563054450365).

The spelling of 231021330233 in words is "two hundred thirty-one billion, twenty-one million, three hundred thirty thousand, two hundred thirty-three".