2203121213 has 4 divisors (see below), whose sum is σ = 2279090940. Its totient is φ = 2127151488.

The previous prime is 2203121191. The next prime is 2203121243. The reversal of 2203121213 is 3121213022.

2203121213 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.

It can be written as a sum of positive squares in 2 ways, for example, as 1789120804 + 414000409 = 42298^2 + 20347^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203121213 - 2¹⁰ = 2203120189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2203121191 and 2203121200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2203121243) 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, 37984820 + ... + 37984877.

It is an arithmetic number, because the mean of its divisors is an integer number (569772735).

Almost surely, 2^2203121213 is an apocalyptic number.

It is an amenable number.

2203121213 is a deficient number, since it is larger than the sum of its proper divisors (75969727).

2203121213 is an equidigital number, since it uses as much as digits as its factorization.

2203121213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75969726.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2203121213 is about 46937.4180478645. The cubic root of 2203121213 is about 1301.2062202904.

Adding to 2203121213 its reverse (3121213022), we get a palindrome (5324334235).

The spelling of 2203121213 in words is "two billion, two hundred three million, one hundred twenty-one thousand, two hundred thirteen".