2133313021 has 4 divisors (see below), whose sum is σ = 2438072032. Its totient is φ = 1828554012.

The previous prime is 2133312991. The next prime is 2133313069. The reversal of 2133313021 is 1203133312.

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 a de Polignac number, because none of the positive numbers 2^k-2133313021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2133313021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133313121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152379495 + ... + 152379508.

It is an arithmetic number, because the mean of its divisors is an integer number (609518008).

Almost surely, 2^2133313021 is an apocalyptic number.

It is an amenable number.

2133313021 is a deficient number, since it is larger than the sum of its proper divisors (304759011).

2133313021 is an equidigital number, since it uses as much as digits as its factorization.

2133313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304759010.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 2133313021 is about 46187.8016471882. The cubic root of 2133313021 is about 1287.3150937649.

Adding to 2133313021 its reverse (1203133312), we get a palindrome (3336446333).

The spelling of 2133313021 in words is "two billion, one hundred thirty-three million, three hundred thirteen thousand, twenty-one".