231300021321 has 12 divisors (see below), whose sum is σ = 337407953220. Its totient is φ = 152673280800.

The previous prime is 231300021313. The next prime is 231300021361. The reversal of 231300021321 is 123120003132.

231300021321 is a `hidden beast` number, since 23 + 1 + 300 + 0 + 21 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 222372606096 + 8927415225 = 471564^2 + 94485^2 .

It is not a de Polignac number, because 231300021321 - 2³ = 231300021313 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231300021294 and 231300021303.

It is not an unprimeable number, because it can be changed into a prime (231300021361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 127226826 + ... + 127228643.

It is an arithmetic number, because the mean of its divisors is an integer number (28117329435).

Almost surely, 2^231300021321 is an apocalyptic number.

It is an amenable number.

231300021321 is a deficient number, since it is larger than the sum of its proper divisors (106107931899).

231300021321 is a wasteful number, since it uses less digits than its factorization.

231300021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254455576 (or 254455573 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231300021321 its reverse (123120003132), we get a palindrome (354420024453).

The spelling of 231300021321 in words is "two hundred thirty-one billion, three hundred million, twenty-one thousand, three hundred twenty-one".