71059712921 has 32 divisors (see below), whose sum is σ = 76696865280. Its totient is φ = 65600905216.

The previous prime is 71059712903. The next prime is 71059712939. The reversal of 71059712921 is 12921795017.

It is an interprime number because it is at equal distance from previous prime (71059712903) and next prime (71059712939).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71059712921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71059712821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 115169405 + ... + 115170021.

It is an arithmetic number, because the mean of its divisors is an integer number (2396777040).

Almost surely, 2^71059712921 is an apocalyptic number.

It is an amenable number.

71059712921 is a deficient number, since it is larger than the sum of its proper divisors (5637152359).

71059712921 is a wasteful number, since it uses less digits than its factorization.

71059712921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273.

The product of its (nonzero) digits is 79380, while the sum is 44.

The spelling of 71059712921 in words is "seventy-one billion, fifty-nine million, seven hundred twelve thousand, nine hundred twenty-one".