231321221233 has 8 divisors (see below), whose sum is σ = 232303952160. Its totient is φ = 230339622240.

The previous prime is 231321221213. The next prime is 231321221239. The reversal of 231321221233 is 332122123132.

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 231321221233 - 2¹³ = 231321213041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231321221198 and 231321221207.

It is not an unprimeable number, because it can be changed into a prime (231321221239) 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, 127866 + ... + 692092.

It is an arithmetic number, because the mean of its divisors is an integer number (29037994020).

Almost surely, 2^231321221233 is an apocalyptic number.

It is an amenable number.

231321221233 is a deficient number, since it is larger than the sum of its proper divisors (982730927).

231321221233 is a wasteful number, since it uses less digits than its factorization.

231321221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565967.

The product of its digits is 2592, while the sum is 25.

Adding to 231321221233 its reverse (332122123132), we get a palindrome (563443344365).

The spelling of 231321221233 in words is "two hundred thirty-one billion, three hundred twenty-one million, two hundred twenty-one thousand, two hundred thirty-three".