21301001012971 has 2 divisors, whose sum is σ = 21301001012972. Its totient is φ = 21301001012970.

The previous prime is 21301001012969. The next prime is 21301001013001. The reversal of 21301001012971 is 17921010010312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21301001012971 - 2¹ = 21301001012969 is a prime.

It is a super-2 number, since 2×21301001012971² (a number of 27 digits) contains 22 as substring.

Together with 21301001012969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21301001012471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650500506485 + 10650500506486.

It is an arithmetic number, because the mean of its divisors is an integer number (10650500506486).

Almost surely, 2^{21301001012971} is an apocalyptic number.

21301001012971 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301001012971 is an equidigital number, since it uses as much as digits as its factorization.

21301001012971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 28.

The spelling of 21301001012971 in words is "twenty-one trillion, three hundred one billion, one million, twelve thousand, nine hundred seventy-one".