12021171 has 8 divisors (see below), whose sum is σ = 16136400. Its totient is φ = 7960032.

The previous prime is 12021131. The next prime is 12021179. The reversal of 12021171 is 17112021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12021171 - 2⁷ = 12021043 is a prime.

It is a super-2 number, since 2×12021171² = 289017104422482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12021171.

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 7 ways as a sum of consecutive naturals, for example, 13000 + ... + 13893.

It is an arithmetic number, because the mean of its divisors is an integer number (2017050).

Almost surely, 2^12021171 is an apocalyptic number.

12021171 is a deficient number, since it is larger than the sum of its proper divisors (4115229).

12021171 is a wasteful number, since it uses less digits than its factorization.

12021171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27045.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 12021171 is about 3467.1560391768. The cubic root of 12021171 is about 229.0774068836.

Adding to 12021171 its reverse (17112021), we get a palindrome (29133192).

The spelling of 12021171 in words is "twelve million, twenty-one thousand, one hundred seventy-one".