1210533728549 has 2 divisors, whose sum is σ = 1210533728550. Its totient is φ = 1210533728548.

The previous prime is 1210533728513. The next prime is 1210533728567. The reversal of 1210533728549 is 9458273350121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 684499749025 + 526033979524 = 827345^2 + 725282^2 .

It is an emirp because it is prime and its reverse (9458273350121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1210533728549 - 2⁴⁰ = 111022100773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1210533728497 and 1210533728506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210533727549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605266864274 + 605266864275.

It is an arithmetic number, because the mean of its divisors is an integer number (605266864275).

Almost surely, 2^{1210533728549} is an apocalyptic number.

It is an amenable number.

1210533728549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210533728549 is an equidigital number, since it uses as much as digits as its factorization.

1210533728549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 50.

The spelling of 1210533728549 in words is "one trillion, two hundred ten billion, five hundred thirty-three million, seven hundred twenty-eight thousand, five hundred forty-nine".