21175074941 has 2 divisors, whose sum is σ = 21175074942. Its totient is φ = 21175074940.

The previous prime is 21175074937. The next prime is 21175075039. The reversal of 21175074941 is 14947057112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20778069316 + 397005625 = 144146^2 + 19925^2 .

It is a cyclic number.

It is not a de Polignac number, because 21175074941 - 2² = 21175074937 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21175074901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10587537470 + 10587537471.

It is an arithmetic number, because the mean of its divisors is an integer number (10587537471).

Almost surely, 2^21175074941 is an apocalyptic number.

It is an amenable number.

21175074941 is a deficient number, since it is larger than the sum of its proper divisors (1).

21175074941 is an equidigital number, since it uses as much as digits as its factorization.

21175074941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 41.

The spelling of 21175074941 in words is "twenty-one billion, one hundred seventy-five million, seventy-four thousand, nine hundred forty-one".