21442232444321 has 8 divisors (see below), whose sum is σ = 23229908205504. Its totient is φ = 19674310006800.

The previous prime is 21442232444317. The next prime is 21442232444333. The reversal of 21442232444321 is 12344423224412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21442232444321 - 2² = 21442232444317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21442232444621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4938328655 + ... + 4938332996.

It is an arithmetic number, because the mean of its divisors is an integer number (2903738525688).

Almost surely, 2^{21442232444321} is an apocalyptic number.

It is an amenable number.

21442232444321 is a deficient number, since it is larger than the sum of its proper divisors (1787675761183).

21442232444321 is a wasteful number, since it uses less digits than its factorization.

21442232444321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9876661831.

The product of its digits is 294912, while the sum is 38.

Adding to 21442232444321 its reverse (12344423224412), we get a palindrome (33786655668733).

The spelling of 21442232444321 in words is "twenty-one trillion, four hundred forty-two billion, two hundred thirty-two million, four hundred forty-four thousand, three hundred twenty-one".