2016021011720 has 32 divisors (see below), whose sum is σ = 4587014107800. Its totient is φ = 797347634688.

The previous prime is 2016021011701. The next prime is 2016021011723. The reversal of 2016021011720 is 271101206102.

It can be written as a sum of positive squares in 4 ways, for example, as 657458262244 + 1358562749476 = 810838^2 + 1165574^2 .

It is a super-3 number, since 3×2016021011720³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2016021011723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283145459 + ... + 283152578.

Almost surely, 2^{2016021011720} is an apocalyptic number.

2016021011720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2016021011720 is an abundant number, since it is smaller than the sum of its proper divisors (2570993096080).

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

2016021011720 is a wasteful number, since it uses less digits than its factorization.

2016021011720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566298137 (or 566298133 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 2016021011720 its reverse (271101206102), we get a palindrome (2287122217822).

The spelling of 2016021011720 in words is "two trillion, sixteen billion, twenty-one million, eleven thousand, seven hundred twenty".