71212421216 has 12 divisors (see below), whose sum is σ = 140199454332. Its totient is φ = 35606210592.

The previous prime is 71212421207. The next prime is 71212421251. The reversal of 71212421216 is 61212421217.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1112694050 + ... + 1112694113.

It is an arithmetic number, because the mean of its divisors is an integer number (11683287861).

Almost surely, 2^71212421216 is an apocalyptic number.

It is an amenable number.

71212421216 is a deficient number, since it is larger than the sum of its proper divisors (68987033116).

71212421216 is a wasteful number, since it uses less digits than its factorization.

71212421216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225388173 (or 2225388165 counting only the distinct ones).

The product of its digits is 2688, while the sum is 29.

Subtracting from 71212421216 its reverse (61212421217), we obtain a palindrome (9999999999).

The spelling of 71212421216 in words is "seventy-one billion, two hundred twelve million, four hundred twenty-one thousand, two hundred sixteen".