21020313201071 has 2 divisors, whose sum is σ = 21020313201072. Its totient is φ = 21020313201070.

The previous prime is 21020313201049. The next prime is 21020313201073. The reversal of 21020313201071 is 17010231302012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21020313201071 - 2¹⁴ = 21020313184687 is a prime.

It is a super-2 number, since 2×21020313201071² (a number of 27 digits) contains 22 as substring.

Together with 21020313201073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21020313201073) 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, 10510156600535 + 10510156600536.

It is an arithmetic number, because the mean of its divisors is an integer number (10510156600536).

Almost surely, 2^{21020313201071} is an apocalyptic number.

21020313201071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21020313201071 is an equidigital number, since it uses as much as digits as its factorization.

21020313201071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21020313201071 its reverse (17010231302012), we get a palindrome (38030544503083).

The spelling of 21020313201071 in words is "twenty-one trillion, twenty billion, three hundred thirteen million, two hundred one thousand, seventy-one".