12011021 has 16 divisors (see below), whose sum is σ = 13953600. Its totient is φ = 10224000.

The previous prime is 12011009. The next prime is 12011029.

12011021 is nontrivially palindromic in base 10.

12011021 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12011021 - 2¹⁰ = 12009997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011029) 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, 20825 + ... + 21393.

It is an arithmetic number, because the mean of its divisors is an integer number (872100).

Almost surely, 2^12011021 is an apocalyptic number.

12011021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011021 is a deficient number, since it is larger than the sum of its proper divisors (1942579).

12011021 is a wasteful number, since it uses less digits than its factorization.

12011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

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

The square root of 12011021 is about 3465.6919943930. The cubic root of 12011021 is about 229.0129153741.

It can be divided in two parts, 1201 and 1021, that multiplied together give a palindrome (1226221).

The spelling of 12011021 in words is "twelve million, eleven thousand, twenty-one".