12021011 has 4 divisors (see below), whose sum is σ = 12041112. Its totient is φ = 12000912.

The previous prime is 12021007. The next prime is 12021013. The reversal of 12021011 is 11012021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11012021 = 2969 ⋅3709.

It is a cyclic number.

It is not a de Polignac number, because 12021011 - 2² = 12021007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12021011.

It is not an unprimeable number, because it can be changed into a prime (12021013) 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, 9125 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (3010278).

Almost surely, 2^12021011 is an apocalyptic number.

12021011 is a deficient number, since it is larger than the sum of its proper divisors (20101).

12021011 is an equidigital number, since it uses as much as digits as its factorization.

12021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20100.

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

The square root of 12021011 is about 3467.1329654341. The cubic root of 12021011 is about 229.0763905504.

Adding to 12021011 its reverse (11012021), we get a palindrome (23033032).

The spelling of 12021011 in words is "twelve million, twenty-one thousand, eleven".