2203213021 has 4 divisors (see below), whose sum is σ = 2244783132. Its totient is φ = 2161642912.

The previous prime is 2203213003. The next prime is 2203213037. The reversal of 2203213021 is 1203123022.

2203213021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1203123022 = 2 ⋅601561511.

It can be written as a sum of positive squares in 2 ways, for example, as 906852996 + 1296360025 = 30114^2 + 36005^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203213021 - 2¹⁵ = 2203180253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2203212986 and 2203213004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203213081) 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, 20784976 + ... + 20785081.

It is an arithmetic number, because the mean of its divisors is an integer number (561195783).

Almost surely, 2^2203213021 is an apocalyptic number.

It is an amenable number.

2203213021 is a deficient number, since it is larger than the sum of its proper divisors (41570111).

2203213021 is an equidigital number, since it uses as much as digits as its factorization.

2203213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41570110.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2203213021 is about 46938.3960207419. The cubic root of 2203213021 is about 1301.2242945692.

Adding to 2203213021 its reverse (1203123022), we get a palindrome (3406336043).

It can be divided in two parts, 22032 and 13021, that added together give a palindrome (35053).

The spelling of 2203213021 in words is "two billion, two hundred three million, two hundred thirteen thousand, twenty-one".