2213203121 has 4 divisors (see below), whose sum is σ = 2289520500. Its totient is φ = 2136885744.

The previous prime is 2213203117. The next prime is 2213203147. The reversal of 2213203121 is 1213023122.

2213203121 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: 1213023122 = 2 ⋅606511561.

It can be written as a sum of positive squares in 2 ways, for example, as 1533818896 + 679384225 = 39164^2 + 26065^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213203121 - 2² = 2213203117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2213203121.

It is not an unprimeable number, because it can be changed into a prime (2213203151) 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, 38158646 + ... + 38158703.

It is an arithmetic number, because the mean of its divisors is an integer number (572380125).

Almost surely, 2^2213203121 is an apocalyptic number.

It is an amenable number.

2213203121 is a deficient number, since it is larger than the sum of its proper divisors (76317379).

2213203121 is an equidigital number, since it uses as much as digits as its factorization.

2213203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76317378.

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

The square root of 2213203121 is about 47044.6928037584. The cubic root of 2213203121 is about 1303.1880572254.

Adding to 2213203121 its reverse (1213023122), we get a palindrome (3426226243).

The spelling of 2213203121 in words is "two billion, two hundred thirteen million, two hundred three thousand, one hundred twenty-one".