2213123021 has 4 divisors (see below), whose sum is σ = 2329603200. Its totient is φ = 2096642844.

The previous prime is 2213122999. The next prime is 2213123047. The reversal of 2213123021 is 1203213122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2213123021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213123621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58240061 + ... + 58240098.

It is an arithmetic number, because the mean of its divisors is an integer number (582400800).

Almost surely, 2^2213123021 is an apocalyptic number.

It is an amenable number.

2213123021 is a deficient number, since it is larger than the sum of its proper divisors (116480179).

2213123021 is a wasteful number, since it uses less digits than its factorization.

2213123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116480178.

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

The square root of 2213123021 is about 47043.8414779235. The cubic root of 2213123021 is about 1303.1723354236.

Adding to 2213123021 its reverse (1203213122), we get a palindrome (3416336143).

The spelling of 2213123021 in words is "two billion, two hundred thirteen million, one hundred twenty-three thousand, twenty-one".