12271021 has 12 divisors (see below), whose sum is σ = 14351232. Its totient is φ = 10461528.

The previous prime is 12271019. The next prime is 12271027. The reversal of 12271021 is 12017221.

It is not a de Polignac number, because 12271021 - 2¹ = 12271019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12270986 and 12271004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12271027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10366 + ... + 11488.

It is an arithmetic number, because the mean of its divisors is an integer number (1195936).

Almost surely, 2^12271021 is an apocalyptic number.

It is an amenable number.

12271021 is a deficient number, since it is larger than the sum of its proper divisors (2080211).

12271021 is a wasteful number, since it uses less digits than its factorization.

12271021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360 (or 1353 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12271021 is about 3503.0017128172. The cubic root of 12271021 is about 230.6535977296.

Adding to 12271021 its reverse (12017221), we get a palindrome (24288242).

The spelling of 12271021 in words is "twelve million, two hundred seventy-one thousand, twenty-one".