2124003221 has 2 divisors, whose sum is σ = 2124003222. Its totient is φ = 2124003220.

The previous prime is 2124003199. The next prime is 2124003227. The reversal of 2124003221 is 1223004212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1690114321 + 433888900 = 41111^2 + 20830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124003221 - 2¹⁰ = 2124002197 is a prime.

It is a super-2 number, since 2×2124003221² = 9022779365636749682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2124003221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2124003227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062001610 + 1062001611.

It is an arithmetic number, because the mean of its divisors is an integer number (1062001611).

Almost surely, 2^2124003221 is an apocalyptic number.

It is an amenable number.

2124003221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124003221 is an equidigital number, since it uses as much as digits as its factorization.

2124003221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2124003221 is about 46086.9094320719. The cubic root of 2124003221 is about 1285.4397443220.

Adding to 2124003221 its reverse (1223004212), we get a palindrome (3347007433).

Subtracting from 2124003221 its reverse (1223004212), we obtain a palindrome (900999009).

The spelling of 2124003221 in words is "two billion, one hundred twenty-four million, three thousand, two hundred twenty-one".