12120011 has 4 divisors (see below), whose sum is σ = 12646992. Its totient is φ = 11593032.

The previous prime is 12120001. The next prime is 12120019. The reversal of 12120011 is 11002121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263456 + ... + 263501.

It is an arithmetic number, because the mean of its divisors is an integer number (3161748).

Almost surely, 2^12120011 is an apocalyptic number.

12120011 is a deficient number, since it is larger than the sum of its proper divisors (526981).

12120011 is an equidigital number, since it uses as much as digits as its factorization.

12120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526980.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 12120011 is about 3481.3806169392. The cubic root of 12120011 is about 229.7035310606.

Adding to 12120011 its reverse (11002121), we get a palindrome (23122132).

The spelling of 12120011 in words is "twelve million, one hundred twenty thousand, eleven".