7061711221 has 4 divisors (see below), whose sum is σ = 7062175692. Its totient is φ = 7061246752.

The previous prime is 7061711197. The next prime is 7061711227. The reversal of 7061711221 is 1221171607.

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 6647140900 + 414570321 = 81530^2 + 20361^2 .

It is a cyclic number.

It is not a de Polignac number, because 7061711221 - 2⁹ = 7061710709 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 7061711221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7061711227) 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, 208630 + ... + 240103.

It is an arithmetic number, because the mean of its divisors is an integer number (1765543923).

Almost surely, 2^7061711221 is an apocalyptic number.

It is an amenable number.

7061711221 is a deficient number, since it is larger than the sum of its proper divisors (464471).

7061711221 is a wasteful number, since it uses less digits than its factorization.

7061711221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464470.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 7061711221 is about 84033.9884868022. The cubic root of 7061711221 is about 1918.5361401472.

Adding to 7061711221 its reverse (1221171607), we get a palindrome (8282882828).

The spelling of 7061711221 in words is "seven billion, sixty-one million, seven hundred eleven thousand, two hundred twenty-one".