2042143221 has 4 divisors (see below), whose sum is σ = 2722857632. Its totient is φ = 1361428812.

The previous prime is 2042143217. The next prime is 2042143249. The reversal of 2042143221 is 1223412402.

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 2042143221 - 2² = 2042143217 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 (2042143261) 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, 340357201 + ... + 340357206.

It is an arithmetic number, because the mean of its divisors is an integer number (680714408).

Almost surely, 2^2042143221 is an apocalyptic number.

It is an amenable number.

2042143221 is a deficient number, since it is larger than the sum of its proper divisors (680714411).

2042143221 is an equidigital number, since it uses as much as digits as its factorization.

2042143221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680714410.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2042143221 is about 45190.0787894865. The cubic root of 2042143221 is about 1268.7091314588.

Adding to 2042143221 its reverse (1223412402), we get a palindrome (3265555623).

The spelling of 2042143221 in words is "two billion, forty-two million, one hundred forty-three thousand, two hundred twenty-one".