231202211213 has 2 divisors, whose sum is σ = 231202211214. Its totient is φ = 231202211212.

The previous prime is 231202211209. The next prime is 231202211221. The reversal of 231202211213 is 312112202132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231151331524 + 50879689 = 480782^2 + 7133^2 .

It is a cyclic number.

It is not a de Polignac number, because 231202211213 - 2² = 231202211209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231202231213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115601105606 + 115601105607.

It is an arithmetic number, because the mean of its divisors is an integer number (115601105607).

Almost surely, 2^231202211213 is an apocalyptic number.

It is an amenable number.

231202211213 is a deficient number, since it is larger than the sum of its proper divisors (1).

231202211213 is an equidigital number, since it uses as much as digits as its factorization.

231202211213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 231202211213 its reverse (312112202132), we get a palindrome (543314413345).

The spelling of 231202211213 in words is "two hundred thirty-one billion, two hundred two million, two hundred eleven thousand, two hundred thirteen".