2020111081 has 2 divisors, whose sum is σ = 2020111082. Its totient is φ = 2020111080.

The previous prime is 2020111073. The next prime is 2020111111. The reversal of 2020111081 is 1801110202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1295640025 + 724471056 = 35995^2 + 26916^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020111081 - 2³ = 2020111073 is a prime.

It is a super-3 number, since 3×2020111081³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2020111031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010055540 + 1010055541.

It is an arithmetic number, because the mean of its divisors is an integer number (1010055541).

Almost surely, 2^2020111081 is an apocalyptic number.

It is an amenable number.

2020111081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020111081 is an equidigital number, since it uses as much as digits as its factorization.

2020111081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 2020111081 is about 44945.6458514059. The cubic root of 2020111081 is about 1264.1300357677.

Adding to 2020111081 its reverse (1801110202), we get a palindrome (3821221283).

The spelling of 2020111081 in words is "two billion, twenty million, one hundred eleven thousand, eighty-one".