71340304021 has 4 divisors (see below), whose sum is σ = 81531776032. Its totient is φ = 61148832012.

The previous prime is 71340304003. The next prime is 71340304039. The reversal of 71340304021 is 12040304317.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (71340304003) and next prime (71340304039).

It is a cyclic number.

It is not a de Polignac number, because 71340304021 - 2⁵ = 71340303989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71340304081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5095735995 + ... + 5095736008.

It is an arithmetic number, because the mean of its divisors is an integer number (20382944008).

Almost surely, 2^71340304021 is an apocalyptic number.

It is an amenable number.

71340304021 is a deficient number, since it is larger than the sum of its proper divisors (10191472011).

71340304021 is a wasteful number, since it uses less digits than its factorization.

71340304021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10191472010.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 71340304021 its reverse (12040304317), we get a palindrome (83380608338).

The spelling of 71340304021 in words is "seventy-one billion, three hundred forty million, three hundred four thousand, twenty-one".