2124421513 has 4 divisors (see below), whose sum is σ = 2124521028. Its totient is φ = 2124322000.

The previous prime is 2124421501. The next prime is 2124421547. The reversal of 2124421513 is 3151244212.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 20548089 + 2103873424 = 4533^2 + 45868^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124421513 - 2⁹ = 2124421001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2124421553) 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, 3238 + ... + 65263.

It is an arithmetic number, because the mean of its divisors is an integer number (531130257).

Almost surely, 2^2124421513 is an apocalyptic number.

It is an amenable number.

2124421513 is a deficient number, since it is larger than the sum of its proper divisors (99515).

2124421513 is an equidigital number, since it uses as much as digits as its factorization.

2124421513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99514.

The product of its digits is 1920, while the sum is 25.

The square root of 2124421513 is about 46091.4472868883. The cubic root of 2124421513 is about 1285.5241217628.

Adding to 2124421513 its reverse (3151244212), we get a palindrome (5275665725).

The spelling of 2124421513 in words is "two billion, one hundred twenty-four million, four hundred twenty-one thousand, five hundred thirteen".