2124353521 has 4 divisors (see below), whose sum is σ = 2124712944. Its totient is φ = 2123994100.

The previous prime is 2124353489. The next prime is 2124353533. The reversal of 2124353521 is 1253534212.

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 not a de Polignac number, because 2124353521 - 2⁵ = 2124353489 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 2124353521.

It is not an unprimeable number, because it can be changed into a prime (2124353551) 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, 170695 + ... + 182716.

It is an arithmetic number, because the mean of its divisors is an integer number (531178236).

Almost surely, 2^2124353521 is an apocalyptic number.

It is an amenable number.

2124353521 is a deficient number, since it is larger than the sum of its proper divisors (359423).

2124353521 is an equidigital number, since it uses as much as digits as its factorization.

2124353521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359422.

The product of its digits is 7200, while the sum is 28.

The square root of 2124353521 is about 46090.7097038004. The cubic root of 2124353521 is about 1285.5104072390.

Adding to 2124353521 its reverse (1253534212), we get a palindrome (3377887733).

The spelling of 2124353521 in words is "two billion, one hundred twenty-four million, three hundred fifty-three thousand, five hundred twenty-one".