21114209141 has 2 divisors, whose sum is σ = 21114209142. Its totient is φ = 21114209140.

The previous prime is 21114209131. The next prime is 21114209143. The reversal of 21114209141 is 14190241112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14581528516 + 6532680625 = 120754^2 + 80825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21114209141 is a prime.

It is a Sophie Germain prime.

Together with 21114209143, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21114209141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21114209143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557104570 + 10557104571.

It is an arithmetic number, because the mean of its divisors is an integer number (10557104571).

Almost surely, 2^21114209141 is an apocalyptic number.

It is an amenable number.

21114209141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114209141 is an equidigital number, since it uses as much as digits as its factorization.

21114209141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 21114209141 in words is "twenty-one billion, one hundred fourteen million, two hundred nine thousand, one hundred forty-one".