2213202121 has 4 divisors (see below), whose sum is σ = 2383448452. Its totient is φ = 2042955792.

The previous prime is 2213202119. The next prime is 2213202151. The reversal of 2213202121 is 1212023122.

It is a happy number.

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 1240448400 + 972753721 = 35220^2 + 31189^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213202121 - 2¹ = 2213202119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2213202095 and 2213202104.

It is not an unprimeable number, because it can be changed into a prime (2213202151) 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, 85123146 + ... + 85123171.

It is an arithmetic number, because the mean of its divisors is an integer number (595862113).

Almost surely, 2^2213202121 is an apocalyptic number.

It is an amenable number.

2213202121 is a deficient number, since it is larger than the sum of its proper divisors (170246331).

2213202121 is a wasteful number, since it uses less digits than its factorization.

2213202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170246330.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2213202121 is about 47044.6821755658. The cubic root of 2213202121 is about 1303.1878609506.

Adding to 2213202121 its reverse (1212023122), we get a palindrome (3425225243).

The spelling of 2213202121 in words is "two billion, two hundred thirteen million, two hundred two thousand, one hundred twenty-one".