12111001 has 16 divisors (see below), whose sum is σ = 14249088. Its totient is φ = 10080000.

The previous prime is 12110971. The next prime is 12111017. The reversal of 12111001 is 10011121.

12111001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12111001 - 2⁷ = 12110873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (12111061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48126 + ... + 48376.

It is an arithmetic number, because the mean of its divisors is an integer number (890568).

Almost surely, 2^12111001 is an apocalyptic number.

It is an amenable number.

12111001 is a deficient number, since it is larger than the sum of its proper divisors (2138087).

12111001 is a wasteful number, since it uses less digits than its factorization.

12111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 12111001 is about 3480.0863495034. The cubic root of 12111001 is about 229.6465965171.

Adding to 12111001 its reverse (10011121), we get a palindrome (22122122).

Multiplying 12111001 by its reverse (10011121), we get a palindrome (121244696442121).

The spelling of 12111001 in words is "twelve million, one hundred eleven thousand, one".