2021161080 has 64 divisors (see below), whose sum is σ = 6087169440. Its totient is φ = 536870912.

The previous prime is 2021161067. The next prime is 2021161111. The reversal of 2021161080 is 801611202.

2021161080 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

2021161080 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It is a super-2 number, since 2×2021161080² = 8170184222613532800, which contains 22 as substring.

2021161080 is an undulating number in base 16.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

In principle, a polygon with 2021161080 sides can be constructed with ruler and compass.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1929 + ... + 63608.

Almost surely, 2^2021161080 is an apocalyptic number.

2021161080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021161080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3043584720).

2021161080 is an abundant number, since it is smaller than the sum of its proper divisors (4066008360).

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

2021161080 is a wasteful number, since it uses less digits than its factorization.

2021161080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65808 (or 65804 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 2021161080 is about 44957.3250983641. The cubic root of 2021161080 is about 1264.3490180110.

Adding to 2021161080 its reverse (801611202), we get a palindrome (2822772282).

The spelling of 2021161080 in words is "two billion, twenty-one million, one hundred sixty-one thousand, eighty".