2124436521 has 4 divisors (see below), whose sum is σ = 2832582032. Its totient is φ = 1416291012.

The previous prime is 2124436463. The next prime is 2124436547. The reversal of 2124436521 is 1256344212.

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 not a de Polignac number, because 2124436521 - 2¹⁰ = 2124435497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2124436421) 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, 354072751 + ... + 354072756.

It is an arithmetic number, because the mean of its divisors is an integer number (708145508).

Almost surely, 2^2124436521 is an apocalyptic number.

It is an amenable number.

2124436521 is a deficient number, since it is larger than the sum of its proper divisors (708145511).

2124436521 is an equidigital number, since it uses as much as digits as its factorization.

2124436521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708145510.

The product of its digits is 11520, while the sum is 30.

The square root of 2124436521 is about 46091.6100933782. The cubic root of 2124436521 is about 1285.5271489557.

The spelling of 2124436521 in words is "two billion, one hundred twenty-four million, four hundred thirty-six thousand, five hundred twenty-one".