2144421321 has 16 divisors (see below), whose sum is σ = 3356006784. Its totient is φ = 1192264704.

The previous prime is 2144421313. The next prime is 2144421341. The reversal of 2144421321 is 1231244412.

It is not a de Polignac number, because 2144421321 - 2³ = 2144421313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2144421291 and 2144421300.

It is not an unprimeable number, because it can be changed into a prime (2144421341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1379160 + ... + 1380713.

It is an arithmetic number, because the mean of its divisors is an integer number (209750424).

Almost surely, 2^2144421321 is an apocalyptic number.

2144421321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2144421321 is a deficient number, since it is larger than the sum of its proper divisors (1211585463).

2144421321 is a wasteful number, since it uses less digits than its factorization.

2144421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759920.

The product of its digits is 1536, while the sum is 24.

The square root of 2144421321 is about 46307.8969615335. The cubic root of 2144421321 is about 1289.5456046381.

Adding to 2144421321 its reverse (1231244412), we get a palindrome (3375665733).

The spelling of 2144421321 in words is "two billion, one hundred forty-four million, four hundred twenty-one thousand, three hundred twenty-one".