2011201081 has 2 divisors, whose sum is σ = 2011201082. Its totient is φ = 2011201080.

The previous prime is 2011201067. The next prime is 2011201103. The reversal of 2011201081 is 1801021102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1824058681 + 187142400 = 42709^2 + 13680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011201081 is a prime.

It is a super-2 number, since 2×2011201081² = 8089859576431137122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2011201061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005600540 + 1005600541.

It is an arithmetic number, because the mean of its divisors is an integer number (1005600541).

Almost surely, 2^2011201081 is an apocalyptic number.

It is an amenable number.

2011201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011201081 is an equidigital number, since it uses as much as digits as its factorization.

2011201081 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2011201081 is about 44846.4165904033. The cubic root of 2011201081 is about 1262.2687521560.

Adding to 2011201081 its reverse (1801021102), we get a palindrome (3812222183).

The spelling of 2011201081 in words is "two billion, eleven million, two hundred one thousand, eighty-one".