231210332221 has 8 divisors (see below), whose sum is σ = 254678284224. Its totient is φ = 208150518720.

The previous prime is 231210332201. The next prime is 231210332251. The reversal of 231210332221 is 122233012132.

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 231210332221 - 2³⁵ = 196850593853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231210332192 and 231210332201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231210332201) 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, 102033436 + ... + 102035701.

It is an arithmetic number, because the mean of its divisors is an integer number (31834785528).

Almost surely, 2^231210332221 is an apocalyptic number.

It is an amenable number.

231210332221 is a deficient number, since it is larger than the sum of its proper divisors (23467952003).

231210332221 is a wasteful number, since it uses less digits than its factorization.

231210332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204069251.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231210332221 its reverse (122233012132), we get a palindrome (353443344353).

The spelling of 231210332221 in words is "two hundred thirty-one billion, two hundred ten million, three hundred thirty-two thousand, two hundred twenty-one".