1131204399973 has 2 divisors, whose sum is σ = 1131204399974. Its totient is φ = 1131204399972.

The previous prime is 1131204399959. The next prime is 1131204400021. The reversal of 1131204399973 is 3799934021311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 979215139809 + 151989260164 = 989553^2 + 389858^2 .

It is an emirp because it is prime and its reverse (3799934021311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131204399973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131204399973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131204399173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565602199986 + 565602199987.

It is an arithmetic number, because the mean of its divisors is an integer number (565602199987).

Almost surely, 2^{1131204399973} is an apocalyptic number.

It is an amenable number.

1131204399973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131204399973 is an equidigital number, since it uses as much as digits as its factorization.

1131204399973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1102248, while the sum is 52.

The spelling of 1131204399973 in words is "one trillion, one hundred thirty-one billion, two hundred four million, three hundred ninety-nine thousand, nine hundred seventy-three".