71212440071 has 4 divisors (see below), whose sum is σ = 75401407152. Its totient is φ = 67023472992.

The previous prime is 71212440067. The next prime is 71212440109. The reversal of 71212440071 is 17004421217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17004421217 = 7 ⋅2429203031.

It is a cyclic number.

It is not a de Polignac number, because 71212440071 - 2² = 71212440067 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71212440041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094483515 + ... + 2094483548.

It is an arithmetic number, because the mean of its divisors is an integer number (18850351788).

Almost surely, 2^71212440071 is an apocalyptic number.

71212440071 is a deficient number, since it is larger than the sum of its proper divisors (4188967081).

71212440071 is a wasteful number, since it uses less digits than its factorization.

71212440071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188967080.

The product of its (nonzero) digits is 3136, while the sum is 29.

Adding to 71212440071 its reverse (17004421217), we get a palindrome (88216861288).

The spelling of 71212440071 in words is "seventy-one billion, two hundred twelve million, four hundred forty thousand, seventy-one".