2203312021 has 4 divisors (see below), whose sum is σ = 2218099500. Its totient is φ = 2188524544.

The previous prime is 2203311983. The next prime is 2203312031. The reversal of 2203312021 is 1202133022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1202133022 = 2 ⋅601066511.

It can be written as a sum of positive squares in 2 ways, for example, as 83722500 + 2119589521 = 9150^2 + 46039^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203312021 - 2¹³ = 2203303829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2203311986 and 2203312004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203312031) 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, 7393516 + ... + 7393813.

It is an arithmetic number, because the mean of its divisors is an integer number (554524875).

Almost surely, 2^2203312021 is an apocalyptic number.

It is an amenable number.

2203312021 is a deficient number, since it is larger than the sum of its proper divisors (14787479).

2203312021 is a wasteful number, since it uses less digits than its factorization.

2203312021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14787478.

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

The square root of 2203312021 is about 46939.4505826389. The cubic root of 2203312021 is about 1301.2437841774.

Adding to 2203312021 its reverse (1202133022), we get a palindrome (3405445043).

The spelling of 2203312021 in words is "two billion, two hundred three million, three hundred twelve thousand, twenty-one".