2132310021 has 4 divisors (see below), whose sum is σ = 2843080032. Its totient is φ = 1421540012.

The previous prime is 2132309989. The next prime is 2132310023. The reversal of 2132310021 is 1200132312.

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 2132310021 - 2⁵ = 2132309989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2132310023) 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, 355385001 + ... + 355385006.

It is an arithmetic number, because the mean of its divisors is an integer number (710770008).

Almost surely, 2^2132310021 is an apocalyptic number.

It is an amenable number.

2132310021 is a deficient number, since it is larger than the sum of its proper divisors (710770011).

2132310021 is an equidigital number, since it uses as much as digits as its factorization.

2132310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710770010.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2132310021 is about 46176.9425254639. The cubic root of 2132310021 is about 1287.1133138053.

Adding to 2132310021 its reverse (1200132312), we get a palindrome (3332442333).

The spelling of 2132310021 in words is "two billion, one hundred thirty-two million, three hundred ten thousand, twenty-one".