7211016720 has 60 divisors (see below), whose sum is σ = 24217000236. Its totient is φ = 1922937600.

The previous prime is 7211016679. The next prime is 7211016731. The reversal of 7211016720 is 276101127.

It can be written as a sum of positive squares in 2 ways, for example, as 4020574464 + 3190442256 = 63408^2 + 56484^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×7211016720² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5006931 + ... + 5008370.

Almost surely, 2^7211016720 is an apocalyptic number.

It is an amenable number.

7211016720 is an abundant number, since it is smaller than the sum of its proper divisors (17005983516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7211016720 is a wasteful number, since it uses less digits than its factorization.

7211016720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10015320 (or 10015311 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 7211016720 is about 84917.7055742794. The cubic root of 7211016720 is about 1931.9631308628.

Adding to 7211016720 its reverse (276101127), we get a palindrome (7487117847).

It can be divided in two parts, 721101 and 6720, that added together give a triangular number (727821 = T₁₂₀₆).

The spelling of 7211016720 in words is "seven billion, two hundred eleven million, sixteen thousand, seven hundred twenty".