212134310494789 has 2 divisors, whose sum is σ = 212134310494790. Its totient is φ = 212134310494788.

The previous prime is 212134310494783. The next prime is 212134310494801. The reversal of 212134310494789 is 987494013431212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178520115544164 + 33614194950625 = 13361142^2 + 5797775^2 .

It is a cyclic number.

It is not a de Polignac number, because 212134310494789 - 2⁴⁵ = 176949938405957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212134310494783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106067155247394 + 106067155247395.

It is an arithmetic number, because the mean of its divisors is an integer number (106067155247395).

Almost surely, 2^{212134310494789} is an apocalyptic number.

It is an amenable number.

212134310494789 is a deficient number, since it is larger than the sum of its proper divisors (1).

212134310494789 is an equidigital number, since it uses as much as digits as its factorization.

212134310494789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 212134310494789 in words is "two hundred twelve trillion, one hundred thirty-four billion, three hundred ten million, four hundred ninety-four thousand, seven hundred eighty-nine".