231222134140213 has 2 divisors, whose sum is σ = 231222134140214. Its totient is φ = 231222134140212.

The previous prime is 231222134140159. The next prime is 231222134140289. The reversal of 231222134140213 is 312041431222132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216240760086129 + 14981374054084 = 14705127^2 + 3870578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231222134140213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231222134540213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115611067070106 + 115611067070107.

It is an arithmetic number, because the mean of its divisors is an integer number (115611067070107).

Almost surely, 2^{231222134140213} is an apocalyptic number.

It is an amenable number.

231222134140213 is a deficient number, since it is larger than the sum of its proper divisors (1).

231222134140213 is an equidigital number, since it uses as much as digits as its factorization.

231222134140213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 231222134140213 its reverse (312041431222132), we get a palindrome (543263565362345).

The spelling of 231222134140213 in words is "two hundred thirty-one trillion, two hundred twenty-two billion, one hundred thirty-four million, one hundred forty thousand, two hundred thirteen".