2121232 has 20 divisors (see below), whose sum is σ = 4134780. Its totient is φ = 1054208.

The previous prime is 2121199. The next prime is 2121239. The reversal of 2121232 is 2321212.

2121232 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

2121232 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 389376 + 1731856 = 624^2 + 1316^2 .

It is an Ulam number.

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

It is not an unprimeable number, because it can be changed into a prime (2121239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3444 + ... + 4012.

It is an arithmetic number, because the mean of its divisors is an integer number (206739).

2^2121232 is an apocalyptic number.

It is an amenable number.

2121232 is a deficient number, since it is larger than the sum of its proper divisors (2013548).

2121232 is a wasteful number, since it uses less digits than its factorization.

2121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810 (or 804 counting only the distinct ones).

The product of its digits is 48, while the sum is 13.

The square root of 2121232 is about 1456.4449869460. Note that the first 3 decimals coincide. The cubic root of 2121232 is about 128.4880456411.

Adding to 2121232 its reverse (2321212), we get a palindrome (4442444).

It can be divided in two parts, 212 and 1232, that added together give a square (1444 = 38²).

The spelling of 2121232 in words is "two million, one hundred twenty-one thousand, two hundred thirty-two".