21214743180641 has 2 divisors, whose sum is σ = 21214743180642. Its totient is φ = 21214743180640.

The previous prime is 21214743180619. The next prime is 21214743180643. The reversal of 21214743180641 is 14608134741212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21212279051041 + 2464129600 = 4605679^2 + 49640^2 .

It is a cyclic number.

It is not a de Polignac number, because 21214743180641 - 2⁶ = 21214743180577 is a prime.

Together with 21214743180643, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21214743180592 and 21214743180601.

It is not a weakly prime, because it can be changed into another prime (21214743180643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607371590320 + 10607371590321.

It is an arithmetic number, because the mean of its divisors is an integer number (10607371590321).

Almost surely, 2^{21214743180641} is an apocalyptic number.

It is an amenable number.

21214743180641 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214743180641 is an equidigital number, since it uses as much as digits as its factorization.

21214743180641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 21214743180641 in words is "twenty-one trillion, two hundred fourteen billion, seven hundred forty-three million, one hundred eighty thousand, six hundred forty-one".