6442231121 has 4 divisors (see below), whose sum is σ = 6442850100. Its totient is φ = 6441612144.

The previous prime is 6442231051. The next prime is 6442231151. The reversal of 6442231121 is 1211322446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 250272400 + 6191958721 = 15820^2 + 78689^2 .

It is a cyclic number.

It is not a de Polignac number, because 6442231121 - 2¹⁰ = 6442230097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442231151) 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, 293606 + ... + 314783.

It is an arithmetic number, because the mean of its divisors is an integer number (1610712525).

Almost surely, 2^6442231121 is an apocalyptic number.

It is an amenable number.

6442231121 is a deficient number, since it is larger than the sum of its proper divisors (618979).

6442231121 is a wasteful number, since it uses less digits than its factorization.

6442231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618978.

The product of its digits is 2304, while the sum is 26.

The square root of 6442231121 is about 80263.5105200364. The cubic root of 6442231121 is about 1860.7103234671.

Adding to 6442231121 its reverse (1211322446), we get a palindrome (7653553567).

The spelling of 6442231121 in words is "six billion, four hundred forty-two million, two hundred thirty-one thousand, one hundred twenty-one".