2143332021 has 4 divisors (see below), whose sum is σ = 2857776032. Its totient is φ = 1428888012.

The previous prime is 2143332007. The next prime is 2143332043. The reversal of 2143332021 is 1202333412.

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 not a de Polignac number, because 2143332021 - 2⁵ = 2143331989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143332421) 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, 357222001 + ... + 357222006.

It is an arithmetic number, because the mean of its divisors is an integer number (714444008).

Almost surely, 2^2143332021 is an apocalyptic number.

It is an amenable number.

2143332021 is a deficient number, since it is larger than the sum of its proper divisors (714444011).

2143332021 is an equidigital number, since it uses as much as digits as its factorization.

2143332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714444010.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2143332021 is about 46296.1339746636. The cubic root of 2143332021 is about 1289.3272178362.

Adding to 2143332021 its reverse (1202333412), we get a palindrome (3345665433).

The spelling of 2143332021 in words is "two billion, one hundred forty-three million, three hundred thirty-two thousand, twenty-one".