12021337 has 4 divisors (see below), whose sum is σ = 12346276. Its totient is φ = 11696400.

The previous prime is 12021311. The next prime is 12021353. The reversal of 12021337 is 73312021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73312021 = 163 ⋅449767.

It can be written as a sum of positive squares in 2 ways, for example, as 11689561 + 331776 = 3419^2 + 576^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021337 - 2¹⁵ = 11988569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021367) 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, 162414 + ... + 162487.

It is an arithmetic number, because the mean of its divisors is an integer number (3086569).

Almost surely, 2^12021337 is an apocalyptic number.

It is an amenable number.

12021337 is a deficient number, since it is larger than the sum of its proper divisors (324939).

12021337 is an equidigital number, since it uses as much as digits as its factorization.

12021337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324938.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 12021337 is about 3467.1799780225. The cubic root of 12021337 is about 229.0784613198.

Adding to 12021337 its reverse (73312021), we get a palindrome (85333358).

It can be divided in two parts, 120213 and 37, that multiplied together give a square (4447881 = 2109²).

The spelling of 12021337 in words is "twelve million, twenty-one thousand, three hundred thirty-seven".