7016541221 has 4 divisors (see below), whose sum is σ = 7018178412. Its totient is φ = 7014904032.

The previous prime is 7016541187. The next prime is 7016541229. The reversal of 7016541221 is 1221456107.

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 2579116225 + 4437424996 = 50785^2 + 66614^2 .

It is a cyclic number.

It is not a de Polignac number, because 7016541221 - 2³⁰ = 5942799397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7016541229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 812150 + ... + 820743.

It is an arithmetic number, because the mean of its divisors is an integer number (1754544603).

Almost surely, 2^7016541221 is an apocalyptic number.

It is an amenable number.

7016541221 is a deficient number, since it is larger than the sum of its proper divisors (1637191).

7016541221 is a wasteful number, since it uses less digits than its factorization.

7016541221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637190.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 7016541221 is about 83764.7970271522. The cubic root of 7016541221 is about 1914.4367697375.

Adding to 7016541221 its reverse (1221456107), we get a palindrome (8237997328).

The spelling of 7016541221 in words is "seven billion, sixteen million, five hundred forty-one thousand, two hundred twenty-one".