2133130021 has 4 divisors (see below), whose sum is σ = 2327050944. Its totient is φ = 1939209100.

The previous prime is 2133129997. The next prime is 2133130049. The reversal of 2133130021 is 1200313312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2133130021 - 2¹⁷ = 2132998949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2133129977 and 2133130004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133130091) 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, 96960445 + ... + 96960466.

It is an arithmetic number, because the mean of its divisors is an integer number (581762736).

Almost surely, 2^2133130021 is an apocalyptic number.

It is an amenable number.

2133130021 is a deficient number, since it is larger than the sum of its proper divisors (193920923).

2133130021 is a wasteful number, since it uses less digits than its factorization.

2133130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193920922.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 2133130021 is about 46185.8205621596. The cubic root of 2133130021 is about 1287.2782831959.

Adding to 2133130021 its reverse (1200313312), we get a palindrome (3333443333).

The spelling of 2133130021 in words is "two billion, one hundred thirty-three million, one hundred thirty thousand, twenty-one".