231332104221 has 16 divisors (see below), whose sum is σ = 321240786048. Its totient is φ = 147939825600.

The previous prime is 231332104193. The next prime is 231332104273. The reversal of 231332104221 is 122401233132.

It is not a de Polignac number, because 231332104221 - 2¹¹ = 231332102173 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231332104191 and 231332104200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231332104291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14668690 + ... + 14684451.

It is an arithmetic number, because the mean of its divisors is an integer number (20077549128).

Almost surely, 2^231332104221 is an apocalyptic number.

It is an amenable number.

231332104221 is a deficient number, since it is larger than the sum of its proper divisors (89908681827).

231332104221 is a wasteful number, since it uses less digits than its factorization.

231332104221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29353252.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 231332104221 its reverse (122401233132), we get a palindrome (353733337353).

The spelling of 231332104221 in words is "two hundred thirty-one billion, three hundred thirty-two million, one hundred four thousand, two hundred twenty-one".