212261742437287 has 2 divisors, whose sum is σ = 212261742437288. Its totient is φ = 212261742437286.

The previous prime is 212261742437189. The next prime is 212261742437341. The reversal of 212261742437287 is 782734247162212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212261742437287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212261742437687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106130871218643 + 106130871218644.

It is an arithmetic number, because the mean of its divisors is an integer number (106130871218644).

Almost surely, 2^{212261742437287} is an apocalyptic number.

212261742437287 is a deficient number, since it is larger than the sum of its proper divisors (1).

212261742437287 is an equidigital number, since it uses as much as digits as its factorization.

212261742437287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25288704, while the sum is 58.

Adding to 212261742437287 its reverse (782734247162212), we get a palindrome (994995989599499).

The spelling of 212261742437287 in words is "two hundred twelve trillion, two hundred sixty-one billion, seven hundred forty-two million, four hundred thirty-seven thousand, two hundred eighty-seven".