2002143421 has 2 divisors, whose sum is σ = 2002143422. Its totient is φ = 2002143420.

The previous prime is 2002143419. The next prime is 2002143457. The reversal of 2002143421 is 1243412002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1954877796 + 47265625 = 44214^2 + 6875^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002143421 - 2¹ = 2002143419 is a prime.

Together with 2002143419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2002143821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1001071710 + 1001071711.

It is an arithmetic number, because the mean of its divisors is an integer number (1001071711).

Almost surely, 2^2002143421 is an apocalyptic number.

It is an amenable number.

2002143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002143421 is an equidigital number, since it uses as much as digits as its factorization.

2002143421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2002143421 is about 44745.3173080715. The cubic root of 2002143421 is about 1260.3709794079.

Adding to 2002143421 its reverse (1243412002), we get a palindrome (3245555423).

The spelling of 2002143421 in words is "two billion, two million, one hundred forty-three thousand, four hundred twenty-one".