2133442121 has 4 divisors (see below), whose sum is σ = 2168416644. Its totient is φ = 2098467600.

The previous prime is 2133442111. The next prime is 2133442133. The reversal of 2133442121 is 1212443312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1084977721 + 1048464400 = 32939^2 + 32380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133442121 - 2²⁶ = 2066333257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2133442111) 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 in 3 ways as a sum of consecutive naturals, for example, 17487170 + ... + 17487291.

It is an arithmetic number, because the mean of its divisors is an integer number (542104161).

Almost surely, 2^2133442121 is an apocalyptic number.

It is an amenable number.

2133442121 is a deficient number, since it is larger than the sum of its proper divisors (34974523).

2133442121 is an equidigital number, since it uses as much as digits as its factorization.

2133442121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34974522.

The product of its digits is 1152, while the sum is 23.

The square root of 2133442121 is about 46189.1991811939. The cubic root of 2133442121 is about 1287.3410610475.

Adding to 2133442121 its reverse (1212443312), we get a palindrome (3345885433).

The spelling of 2133442121 in words is "two billion, one hundred thirty-three million, four hundred forty-two thousand, one hundred twenty-one".