71212421217 has 32 divisors (see below), whose sum is σ = 113132878848. Its totient is φ = 38996508096.

The previous prime is 71212421207. The next prime is 71212421251.

71212421217 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 71212421217 - 2⁶ = 71212421153 is a prime.

It is a super-2 number, since 2×71212421217² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71212421207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 696123 + ... + 791840.

It is an arithmetic number, because the mean of its divisors is an integer number (3535402464).

Almost surely, 2^71212421217 is an apocalyptic number.

It is an amenable number.

71212421217 is a deficient number, since it is larger than the sum of its proper divisors (41920457631).

71212421217 is a wasteful number, since it uses less digits than its factorization.

71212421217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488069.

The product of its digits is 3136, while the sum is 30.

The spelling of 71212421217 in words is "seventy-one billion, two hundred twelve million, four hundred twenty-one thousand, two hundred seventeen".