202121224 has 16 divisors (see below), whose sum is σ = 386128620. Its totient is φ = 99153600.

The previous prime is 202121219. The next prime is 202121233. The reversal of 202121224 is 422121202.

It can be written as a sum of positive squares in 2 ways, for example, as 196504324 + 5616900 = 14018^2 + 2370^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202121198 and 202121207.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237927 + ... + 238774.

Almost surely, 2^202121224 is an apocalyptic number.

It is an amenable number.

202121224 is a deficient number, since it is larger than the sum of its proper divisors (184007396).

202121224 is a wasteful number, since it uses less digits than its factorization.

202121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476760 (or 476756 counting only the distinct ones).

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

The square root of 202121224 is about 14216.9344093584. The cubic root of 202121224 is about 586.8637798966.

Adding to 202121224 its reverse (422121202), we get a palindrome (624242426).

The spelling of 202121224 in words is "two hundred two million, one hundred twenty-one thousand, two hundred twenty-four".