11321209973 has 2 divisors, whose sum is σ = 11321209974. Its totient is φ = 11321209972.

The previous prime is 11321209909. The next prime is 11321209981. The reversal of 11321209973 is 37990212311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11308833649 + 12376324 = 106343^2 + 3518^2 .

It is a cyclic number.

It is not a de Polignac number, because 11321209973 - 2⁶ = 11321209909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11321209873) 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, 5660604986 + 5660604987.

It is an arithmetic number, because the mean of its divisors is an integer number (5660604987).

Almost surely, 2^11321209973 is an apocalyptic number.

It is an amenable number.

11321209973 is a deficient number, since it is larger than the sum of its proper divisors (1).

11321209973 is an equidigital number, since it uses as much as digits as its factorization.

11321209973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The spelling of 11321209973 in words is "eleven billion, three hundred twenty-one million, two hundred nine thousand, nine hundred seventy-three".