71121112210111 has 16 divisors (see below), whose sum is σ = 72143154943200. Its totient is φ = 70108139122560.

The previous prime is 71121112210087. The next prime is 71121112210217. The reversal of 71121112210111 is 11101221112117.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71121112210111 - 2¹¹ = 71121112208063 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 (71121112210711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8601556 + ... + 14704726.

It is an arithmetic number, because the mean of its divisors is an integer number (4508947183950).

Almost surely, 2^{71121112210111} is an apocalyptic number.

71121112210111 is a deficient number, since it is larger than the sum of its proper divisors (1022042733089).

71121112210111 is a wasteful number, since it uses less digits than its factorization.

71121112210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6103914.

The product of its (nonzero) digits is 56, while the sum is 22.

Adding to 71121112210111 its reverse (11101221112117), we get a palindrome (82222333322228).

The spelling of 71121112210111 in words is "seventy-one trillion, one hundred twenty-one billion, one hundred twelve million, two hundred ten thousand, one hundred eleven".