7044212521 has 4 divisors (see below), whose sum is σ = 7044505812. Its totient is φ = 7043919232.

The previous prime is 7044212519. The next prime is 7044212537. The reversal of 7044212521 is 1252124407.

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 4975327296 + 2068885225 = 70536^2 + 45485^2 .

It is a cyclic number.

It is not a de Polignac number, because 7044212521 - 2¹ = 7044212519 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 7044212521.

It is not an unprimeable number, because it can be changed into a prime (7044212621) 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, 107056 + ... + 159841.

It is an arithmetic number, because the mean of its divisors is an integer number (1761126453).

Almost surely, 2^7044212521 is an apocalyptic number.

It is an amenable number.

7044212521 is a deficient number, since it is larger than the sum of its proper divisors (293291).

7044212521 is a wasteful number, since it uses less digits than its factorization.

7044212521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293290.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 7044212521 is about 83929.8071068914. The cubic root of 7044212521 is about 1916.9501385123.

Adding to 7044212521 its reverse (1252124407), we get a palindrome (8296336928).

The spelling of 7044212521 in words is "seven billion, forty-four million, two hundred twelve thousand, five hundred twenty-one".