12021173 has 4 divisors (see below), whose sum is σ = 12042240. Its totient is φ = 12000108.

The previous prime is 12021131. The next prime is 12021179. The reversal of 12021173 is 37112021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37112021 = 89 ⋅416989.

It is a cyclic number.

It is not a de Polignac number, because 12021173 - 2⁸ = 12020917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021179) 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, 9653 + ... + 10826.

It is an arithmetic number, because the mean of its divisors is an integer number (3010560).

Almost surely, 2^12021173 is an apocalyptic number.

It is an amenable number.

12021173 is a deficient number, since it is larger than the sum of its proper divisors (21067).

12021173 is an equidigital number, since it uses as much as digits as its factorization.

12021173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21066.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 12021173 is about 3467.1563275976. The cubic root of 12021173 is about 229.0774195877.

Adding to 12021173 its reverse (37112021), we get a palindrome (49133194).

The spelling of 12021173 in words is "twelve million, twenty-one thousand, one hundred seventy-three".