11221309973 has 2 divisors, whose sum is σ = 11221309974. Its totient is φ = 11221309972.

The previous prime is 11221309963. The next prime is 11221310027. The reversal of 11221309973 is 37990312211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10252980049 + 968329924 = 101257^2 + 31118^2 .

It is an emirp because it is prime and its reverse (37990312211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11221309973 - 2²² = 11217115669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11221309903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610654986 + 5610654987.

It is an arithmetic number, because the mean of its divisors is an integer number (5610654987).

Almost surely, 2^11221309973 is an apocalyptic number.

It is an amenable number.

11221309973 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221309973 is an equidigital number, since it uses as much as digits as its factorization.

11221309973 is an evil number, because the sum of its binary digits is even.

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

The spelling of 11221309973 in words is "eleven billion, two hundred twenty-one million, three hundred nine thousand, nine hundred seventy-three".