2121224 has 16 divisors (see below), whose sum is σ = 4545600. Its totient is φ = 909072.

The previous prime is 2121199. The next prime is 2121239. The reversal of 2121224 is 4221212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2121199 and 2121208.

It is an unprimeable number.

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, 18884 + ... + 18995.

It is an arithmetic number, because the mean of its divisors is an integer number (284100).

2^2121224 is an apocalyptic number.

It is an amenable number.

2121224 is an abundant number, since it is smaller than the sum of its proper divisors (2424376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121224 is a wasteful number, since it uses less digits than its factorization.

2121224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37892 (or 37888 counting only the distinct ones).

The product of its digits is 64, while the sum is 14.

The square root of 2121224 is about 1456.4422405300. The cubic root of 2121224 is about 128.4878841146.

Adding to 2121224 its reverse (4221212), we get a palindrome (6342436).

The spelling of 2121224 in words is "two million, one hundred twenty-one thousand, two hundred twenty-four".