71011121 has 8 divisors (see below), whose sum is σ = 71885664. Its totient is φ = 70141120.

The previous prime is 71011093. The next prime is 71011123. The reversal of 71011121 is 12111017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71011121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71011096 and 71011105.

It is not an unprimeable number, because it can be changed into a prime (71011123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38306 + ... + 40116.

It is an arithmetic number, because the mean of its divisors is an integer number (8985708).

Almost surely, 2^71011121 is an apocalyptic number.

It is an amenable number.

71011121 is a deficient number, since it is larger than the sum of its proper divisors (874543).

71011121 is a wasteful number, since it uses less digits than its factorization.

71011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271.

The product of its (nonzero) digits is 14, while the sum is 14.

The square root of 71011121 is about 8426.8096572784. The cubic root of 71011121 is about 414.1033935480.

Adding to 71011121 its reverse (12111017), we get a palindrome (83122138).

The spelling of 71011121 in words is "seventy-one million, eleven thousand, one hundred twenty-one".