71212011 has 16 divisors (see below), whose sum is σ = 103658016. Its totient is φ = 43220736.

The previous prime is 71212007. The next prime is 71212033. The reversal of 71212011 is 11021217.

It is not a de Polignac number, because 71212011 - 2² = 71212007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71212051) 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 15 ways as a sum of consecutive naturals, for example, 9660 + ... + 15353.

It is an arithmetic number, because the mean of its divisors is an integer number (6478626).

Almost surely, 2^71212011 is an apocalyptic number.

71212011 is a deficient number, since it is larger than the sum of its proper divisors (32446005).

71212011 is a wasteful number, since it uses less digits than its factorization.

71212011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25102.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 71212011 is about 8438.7209338857. The cubic root of 71212011 is about 414.4935244897.

Adding to 71212011 its reverse (11021217), we get a palindrome (82233228).

The spelling of 71212011 in words is "seventy-one million, two hundred twelve thousand, eleven".