12391011 has 24 divisors (see below), whose sum is σ = 19150560. Its totient is φ = 7693056.

The previous prime is 12391007. The next prime is 12391019. The reversal of 12391011 is 11019321.

12391011 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12391011 - 2² = 12391007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12391019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16306 + ... + 17048.

It is an arithmetic number, because the mean of its divisors is an integer number (797940).

Almost surely, 2^12391011 is an apocalyptic number.

12391011 is a deficient number, since it is larger than the sum of its proper divisors (6759549).

12391011 is a wasteful number, since it uses less digits than its factorization.

12391011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 12391011 is about 3520.0867887028. The cubic root of 12391011 is about 231.4029622522.

The spelling of 12391011 in words is "twelve million, three hundred ninety-one thousand, eleven".