11121021973 has 2 divisors, whose sum is σ = 11121021974. Its totient is φ = 11121021972.

The previous prime is 11121021913. The next prime is 11121022009. The reversal of 11121021973 is 37912012111.

11121021973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10944716689 + 176305284 = 104617^2 + 13278^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121021973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121021913) 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, 5560510986 + 5560510987.

It is an arithmetic number, because the mean of its divisors is an integer number (5560510987).

Almost surely, 2^11121021973 is an apocalyptic number.

It is an amenable number.

11121021973 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121021973 is an equidigital number, since it uses as much as digits as its factorization.

11121021973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 28.

The spelling of 11121021973 in words is "eleven billion, one hundred twenty-one million, twenty-one thousand, nine hundred seventy-three".