210221001224 has 16 divisors (see below), whose sum is σ = 424484714220. Its totient is φ = 97025077440.

The previous prime is 210221001223. The next prime is 210221001227. The reversal of 210221001224 is 422100122012.

It can be written as a sum of positive squares in 2 ways, for example, as 202509000100 + 7712001124 = 450010^2 + 87818^2 .

It is not an unprimeable number, because it can be changed into a prime (210221001223) 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, 1010677787 + ... + 1010677994.

Almost surely, 2^210221001224 is an apocalyptic number.

It is an amenable number.

210221001224 is an abundant number, since it is smaller than the sum of its proper divisors (214263712996).

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

210221001224 is a wasteful number, since it uses less digits than its factorization.

210221001224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021355800 (or 2021355796 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210221001224 its reverse (422100122012), we get a palindrome (632321123236).

The spelling of 210221001224 in words is "two hundred ten billion, two hundred twenty-one million, one thousand, two hundred twenty-four".