2143223021 has 4 divisors (see below), whose sum is σ = 2145440352. Its totient is φ = 2141005692.

The previous prime is 2143222979. The next prime is 2143223029. The reversal of 2143223021 is 1203223412.

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 2143223021 - 2³⁰ = 1069481197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2143222984 and 2143223002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143223029) 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, 1107215 + ... + 1109148.

It is an arithmetic number, because the mean of its divisors is an integer number (536360088).

Almost surely, 2^2143223021 is an apocalyptic number.

It is an amenable number.

2143223021 is a deficient number, since it is larger than the sum of its proper divisors (2217331).

2143223021 is an equidigital number, since it uses as much as digits as its factorization.

2143223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217330.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2143223021 is about 46294.9567555690. The cubic root of 2143223021 is about 1289.3053610500.

Adding to 2143223021 its reverse (1203223412), we get a palindrome (3346446433).

The spelling of 2143223021 in words is "two billion, one hundred forty-three million, two hundred twenty-three thousand, twenty-one".