7211728871 has 2 divisors, whose sum is σ = 7211728872. Its totient is φ = 7211728870.

The previous prime is 7211728847. The next prime is 7211728877. The reversal of 7211728871 is 1788271127.

7211728871 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7211728871 - 2⁶ = 7211728807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7211728877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3605864435 + 3605864436.

It is an arithmetic number, because the mean of its divisors is an integer number (3605864436).

Almost surely, 2^7211728871 is an apocalyptic number.

7211728871 is a deficient number, since it is larger than the sum of its proper divisors (1).

7211728871 is an equidigital number, since it uses as much as digits as its factorization.

7211728871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 44.

The square root of 7211728871 is about 84921.8986539985. The cubic root of 7211728871 is about 1932.0267281908.

Adding to 7211728871 its reverse (1788271127), we get a palindrome (8999999998).

The spelling of 7211728871 in words is "seven billion, two hundred eleven million, seven hundred twenty-eight thousand, eight hundred seventy-one".