71221176231 has 16 divisors (see below), whose sum is σ = 95788649088. Its totient is φ = 47068018400.

The previous prime is 71221176227. The next prime is 71221176233. The reversal of 71221176231 is 13267112217.

It is a cyclic number.

It is not a de Polignac number, because 71221176231 - 2² = 71221176227 is a prime.

It is a super-2 number, since 2×71221176231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71221176192 and 71221176201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71221176233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273520 + ... + 466106.

It is an arithmetic number, because the mean of its divisors is an integer number (5986790568).

Almost surely, 2^71221176231 is an apocalyptic number.

71221176231 is a deficient number, since it is larger than the sum of its proper divisors (24567472857).

71221176231 is a wasteful number, since it uses less digits than its factorization.

71221176231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193662.

The product of its digits is 7056, while the sum is 33.

Adding to 71221176231 its reverse (13267112217), we get a palindrome (84488288448).

The spelling of 71221176231 in words is "seventy-one billion, two hundred twenty-one million, one hundred seventy-six thousand, two hundred thirty-one".