1218210008733 has 6 divisors (see below), whose sum is σ = 1759636679294. Its totient is φ = 812140005816.

The previous prime is 1218210008699. The next prime is 1218210008789. The reversal of 1218210008733 is 3378000128121.

It can be written as a sum of positive squares in only one way, i.e., 1213463074329 + 4746934404 = 1101573^2 + 68898^2 .

It is not a de Polignac number, because 1218210008733 - 2¹³ = 1218210000541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218210003733) 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 in 5 ways as a sum of consecutive naturals, for example, 67678333810 + ... + 67678333827.

Almost surely, 2^{1218210008733} is an apocalyptic number.

It is an amenable number.

1218210008733 is a deficient number, since it is larger than the sum of its proper divisors (541426670561).

1218210008733 is a wasteful number, since it uses less digits than its factorization.

1218210008733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135356667643 (or 135356667640 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 1218210008733 in words is "one trillion, two hundred eighteen billion, two hundred ten million, eight thousand, seven hundred thirty-three".