71222211212 has 24 divisors (see below), whose sum is σ = 134778458304. Its totient is φ = 32803219712.

The previous prime is 71222211211. The next prime is 71222211233. The reversal of 71222211212 is 21211222217.

It is not an unprimeable number, because it can be changed into a prime (71222211211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11139203 + ... + 11145594.

It is an arithmetic number, because the mean of its divisors is an integer number (5615769096).

Almost surely, 2^71222211212 is an apocalyptic number.

It is an amenable number.

71222211212 is a deficient number, since it is larger than the sum of its proper divisors (63556247092).

71222211212 is a wasteful number, since it uses less digits than its factorization.

71222211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22284865 (or 22284863 counting only the distinct ones).

The product of its digits is 448, while the sum is 23.

Adding to 71222211212 its reverse (21211222217), we get a palindrome (92433433429).

The spelling of 71222211212 in words is "seventy-one billion, two hundred twenty-two million, two hundred eleven thousand, two hundred twelve".