2123446221 has 12 divisors (see below), whose sum is σ = 3303138748. Its totient is φ = 1306736064.

The previous prime is 2123446201. The next prime is 2123446231. The reversal of 2123446221 is 1226443212.

2123446221 is a `hidden beast` number, since 2 + 1 + 2 + 34 + 4 + 622 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 169364196 + 1954082025 = 13014^2 + 44205^2 .

It is not a de Polignac number, because 2123446221 - 2⁷ = 2123446093 is a prime.

It is a super-4 number, since 4×2123446221⁴ (a number of 38 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123446201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9074440 + ... + 9074673.

Almost surely, 2^2123446221 is an apocalyptic number.

It is an amenable number.

2123446221 is a deficient number, since it is larger than the sum of its proper divisors (1179692527).

2123446221 is a wasteful number, since it uses less digits than its factorization.

2123446221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18149132 (or 18149129 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 2123446221 is about 46080.8661051417. The cubic root of 2123446221 is about 1285.3273696440.

Adding to 2123446221 its reverse (1226443212), we get a palindrome (3349889433).

The spelling of 2123446221 in words is "two billion, one hundred twenty-three million, four hundred forty-six thousand, two hundred twenty-one".