1206220435813 has 2 divisors, whose sum is σ = 1206220435814. Its totient is φ = 1206220435812.

The previous prime is 1206220435757. The next prime is 1206220435841. The reversal of 1206220435813 is 3185340226021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1206170634564 + 49801249 = 1098258^2 + 7057^2 .

It is an emirp because it is prime and its reverse (3185340226021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206220435813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206220439813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603110217906 + 603110217907.

It is an arithmetic number, because the mean of its divisors is an integer number (603110217907).

Almost surely, 2^{1206220435813} is an apocalyptic number.

It is an amenable number.

1206220435813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206220435813 is an equidigital number, since it uses as much as digits as its factorization.

1206220435813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 1206220435813 in words is "one trillion, two hundred six billion, two hundred twenty million, four hundred thirty-five thousand, eight hundred thirteen".