2133211081 has 2 divisors, whose sum is σ = 2133211082. Its totient is φ = 2133211080.

The previous prime is 2133211063. The next prime is 2133211109. The reversal of 2133211081 is 1801123312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1412557056 + 720654025 = 37584^2 + 26845^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133211081 - 2⁵ = 2133211049 is a prime.

It is a super-3 number, since 3×2133211081³ (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 (2133271081) 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, 1066605540 + 1066605541.

It is an arithmetic number, because the mean of its divisors is an integer number (1066605541).

Almost surely, 2^2133211081 is an apocalyptic number.

It is an amenable number.

2133211081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133211081 is an equidigital number, since it uses as much as digits as its factorization.

2133211081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 2133211081 is about 46186.6980958804. The cubic root of 2133211081 is about 1287.2945887273.

Adding to 2133211081 its reverse (1801123312), we get a palindrome (3934334393).

The spelling of 2133211081 in words is "two billion, one hundred thirty-three million, two hundred eleven thousand, eighty-one".