2120021224 has 16 divisors (see below), whose sum is σ = 4011509700. Its totient is φ = 1050285312.

The previous prime is 2120021179. The next prime is 2120021237. The reversal of 2120021224 is 4221200212.

It can be written as a sum of positive squares in 2 ways, for example, as 2068612324 + 51408900 = 45482^2 + 7170^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2120021198 and 2120021207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214737 + ... + 1216480.

Almost surely, 2^2120021224 is an apocalyptic number.

It is an amenable number.

2120021224 is a deficient number, since it is larger than the sum of its proper divisors (1891488476).

2120021224 is a wasteful number, since it uses less digits than its factorization.

2120021224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431332 (or 2431328 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2120021224 is about 46043.6882102205. The cubic root of 2120021224 is about 1284.6359446514.

Adding to 2120021224 its reverse (4221200212), we get a palindrome (6341221436).

It can be divided in two parts, 21200 and 21224, that added together give a palindrome (42424).

The spelling of 2120021224 in words is "two billion, one hundred twenty million, twenty-one thousand, two hundred twenty-four".