2124301021 has 4 divisors (see below), whose sum is σ = 2129996572. Its totient is φ = 2118605472.

The previous prime is 2124300989. The next prime is 2124301033. The reversal of 2124301021 is 1201034212.

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 399560121 + 1724740900 = 19989^2 + 41530^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124301021 - 2⁵ = 2124300989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2124300986 and 2124301004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124301121) 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 3 ways as a sum of consecutive naturals, for example, 2847216 + ... + 2847961.

It is an arithmetic number, because the mean of its divisors is an integer number (532499143).

Almost surely, 2^2124301021 is an apocalyptic number.

It is an amenable number.

2124301021 is a deficient number, since it is larger than the sum of its proper divisors (5695551).

2124301021 is an equidigital number, since it uses as much as digits as its factorization.

2124301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5695550.

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

The square root of 2124301021 is about 46090.1401711906. The cubic root of 2124301021 is about 1285.4998173738.

Adding to 2124301021 its reverse (1201034212), we get a palindrome (3325335233).

The spelling of 2124301021 in words is "two billion, one hundred twenty-four million, three hundred one thousand, twenty-one".