21111324202271 has 2 divisors, whose sum is σ = 21111324202272. Its totient is φ = 21111324202270.

The previous prime is 21111324202181. The next prime is 21111324202313. The reversal of 21111324202271 is 17220242311112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21111324202271 - 2³⁰ = 21110250460447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21111324282271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555662101135 + 10555662101136.

It is an arithmetic number, because the mean of its divisors is an integer number (10555662101136).

Almost surely, 2^{21111324202271} is an apocalyptic number.

21111324202271 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111324202271 is an equidigital number, since it uses as much as digits as its factorization.

21111324202271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

Adding to 21111324202271 its reverse (17220242311112), we get a palindrome (38331566513383).

The spelling of 21111324202271 in words is "twenty-one trillion, one hundred eleven billion, three hundred twenty-four million, two hundred two thousand, two hundred seventy-one".