71121102211 has 4 divisors (see below), whose sum is σ = 71185935672. Its totient is φ = 71056268752.

The previous prime is 71121102209. The next prime is 71121102223. The reversal of 71121102211 is 11220112117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71121102211 - 2¹ = 71121102209 is a prime.

It is a super-2 number, since 2×71121102211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71121102011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32415085 + ... + 32417278.

It is an arithmetic number, because the mean of its divisors is an integer number (17796483918).

Almost surely, 2^71121102211 is an apocalyptic number.

71121102211 is a deficient number, since it is larger than the sum of its proper divisors (64833461).

71121102211 is a wasteful number, since it uses less digits than its factorization.

71121102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64833460.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 71121102211 its reverse (11220112117), we get a palindrome (82341214328).

The spelling of 71121102211 in words is "seventy-one billion, one hundred twenty-one million, one hundred two thousand, two hundred eleven".