71039249121 has 16 divisors (see below), whose sum is σ = 95711704704. Its totient is φ = 46863312384.

The previous prime is 71039249119. The next prime is 71039249191. The reversal of 71039249121 is 12194293017.

It is not a de Polignac number, because 71039249121 - 2¹ = 71039249119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71039249121.

It is not an unprimeable number, because it can be changed into a prime (71039249191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2056831 + ... + 2091083.

It is an arithmetic number, because the mean of its divisors is an integer number (5981981544).

Almost surely, 2^71039249121 is an apocalyptic number.

It is an amenable number.

71039249121 is a deficient number, since it is larger than the sum of its proper divisors (24672455583).

71039249121 is a wasteful number, since it uses less digits than its factorization.

71039249121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41480.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 71039249121 in words is "seventy-one billion, thirty-nine million, two hundred forty-nine thousand, one hundred twenty-one".