2121272 has 16 divisors (see below), whose sum is σ = 4053240. Its totient is φ = 1040416.

The previous prime is 2121271. The next prime is 2121289. The reversal of 2121272 is 2721212.

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 2121272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121271) 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, 2078 + ... + 2925.

2^2121272 is an apocalyptic number.

It is an amenable number.

2121272 is a deficient number, since it is larger than the sum of its proper divisors (1931968).

2121272 is a wasteful number, since it uses less digits than its factorization.

2121272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5062 (or 5058 counting only the distinct ones).

The product of its digits is 112, while the sum is 17.

The square root of 2121272 is about 1456.4587189481. The cubic root of 2121272 is about 128.4888532676.

Adding to 2121272 its reverse (2721212), we get a palindrome (4842484).

The spelling of 2121272 in words is "two million, one hundred twenty-one thousand, two hundred seventy-two".