212134434013 has 2 divisors, whose sum is σ = 212134434014. Its totient is φ = 212134434012.

The previous prime is 212134433999. The next prime is 212134434103. The reversal of 212134434013 is 310434431212.

It is a happy number.

Together with next prime (212134434103) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210531392569 + 1603041444 = 458837^2 + 40038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212134434013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212134434713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106067217006 + 106067217007.

It is an arithmetic number, because the mean of its divisors is an integer number (106067217007).

Almost surely, 2^212134434013 is an apocalyptic number.

It is an amenable number.

212134434013 is a deficient number, since it is larger than the sum of its proper divisors (1).

212134434013 is an equidigital number, since it uses as much as digits as its factorization.

212134434013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 212134434013 its reverse (310434431212), we get a palindrome (522568865225).

The spelling of 212134434013 in words is "two hundred twelve billion, one hundred thirty-four million, four hundred thirty-four thousand, thirteen".