21301041071 has 2 divisors, whose sum is σ = 21301041072. Its totient is φ = 21301041070.

The previous prime is 21301041031. The next prime is 21301041119. The reversal of 21301041071 is 17014010312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21301041071 - 2³⁰ = 20227299247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21301041031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650520535 + 10650520536.

It is an arithmetic number, because the mean of its divisors is an integer number (10650520536).

Almost surely, 2^21301041071 is an apocalyptic number.

21301041071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301041071 is an equidigital number, since it uses as much as digits as its factorization.

21301041071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 21301041071 its reverse (17014010312), we get a palindrome (38315051383).

The spelling of 21301041071 in words is "twenty-one billion, three hundred one million, forty-one thousand, seventy-one".