21843102320441 has 2 divisors, whose sum is σ = 21843102320442. Its totient is φ = 21843102320440.

The previous prime is 21843102320419. The next prime is 21843102320449. The reversal of 21843102320441 is 14402320134812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21811561981225 + 31540339216 = 4670285^2 + 177596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21843102320441 is a prime.

It is a super-2 number, since 2×21843102320441² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21843102320449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10921551160220 + 10921551160221.

It is an arithmetic number, because the mean of its divisors is an integer number (10921551160221).

Almost surely, 2^{21843102320441} is an apocalyptic number.

It is an amenable number.

21843102320441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21843102320441 is an equidigital number, since it uses as much as digits as its factorization.

21843102320441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 35.

The spelling of 21843102320441 in words is "twenty-one trillion, eight hundred forty-three billion, one hundred two million, three hundred twenty thousand, four hundred forty-one".