21313002123071 has 2 divisors, whose sum is σ = 21313002123072. Its totient is φ = 21313002123070.

The previous prime is 21313002123067. The next prime is 21313002123073. The reversal of 21313002123071 is 17032120031312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21313002123071 - 2² = 21313002123067 is a prime.

Together with 21313002123073, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21313002123071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313002123073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656501061535 + 10656501061536.

It is an arithmetic number, because the mean of its divisors is an integer number (10656501061536).

Almost surely, 2^{21313002123071} is an apocalyptic number.

21313002123071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313002123071 is an equidigital number, since it uses as much as digits as its factorization.

21313002123071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 21313002123071 its reverse (17032120031312), we get a palindrome (38345122154383).

The spelling of 21313002123071 in words is "twenty-one trillion, three hundred thirteen billion, two million, one hundred twenty-three thousand, seventy-one".