21112000209941 has 2 divisors, whose sum is σ = 21112000209942. Its totient is φ = 21112000209940.

The previous prime is 21112000209851. The next prime is 21112000210013. The reversal of 21112000209941 is 14990200021112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20863463063716 + 248537146225 = 4567654^2 + 498535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112000209941 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21112000209898 and 21112000209907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112000209241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556000104970 + 10556000104971.

It is an arithmetic number, because the mean of its divisors is an integer number (10556000104971).

Almost surely, 2^{21112000209941} is an apocalyptic number.

It is an amenable number.

21112000209941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112000209941 is an equidigital number, since it uses as much as digits as its factorization.

21112000209941 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 32.

The spelling of 21112000209941 in words is "twenty-one trillion, one hundred twelve billion, two hundred nine thousand, nine hundred forty-one".