231200203031321 has 2 divisors, whose sum is σ = 231200203031322. Its totient is φ = 231200203031320.

The previous prime is 231200203031299. The next prime is 231200203031383. The reversal of 231200203031321 is 123130302002132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176558612951296 + 54641590080025 = 13287536^2 + 7391995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231200203031321 is a prime.

It is not a weakly prime, because it can be changed into another prime (231200203031821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115600101515660 + 115600101515661.

It is an arithmetic number, because the mean of its divisors is an integer number (115600101515661).

Almost surely, 2^{231200203031321} is an apocalyptic number.

It is an amenable number.

231200203031321 is a deficient number, since it is larger than the sum of its proper divisors (1).

231200203031321 is an equidigital number, since it uses as much as digits as its factorization.

231200203031321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 231200203031321 its reverse (123130302002132), we get a palindrome (354330505033453).

The spelling of 231200203031321 in words is "two hundred thirty-one trillion, two hundred billion, two hundred three million, thirty-one thousand, three hundred twenty-one".