21444144131422 has 8 divisors (see below), whose sum is σ = 32205395512872. Its totient is φ = 10709012293800.

The previous prime is 21444144131411. The next prime is 21444144131429. The reversal of 21444144131422 is 22413144144412.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21444144131429) 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, 6529883904 + ... + 6529887187.

It is an arithmetic number, because the mean of its divisors is an integer number (4025674439109).

Almost surely, 2^{21444144131422} is an apocalyptic number.

21444144131422 is a deficient number, since it is larger than the sum of its proper divisors (10761251381450).

21444144131422 is a wasteful number, since it uses less digits than its factorization.

21444144131422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13059771914.

The product of its digits is 98304, while the sum is 37.

Adding to 21444144131422 its reverse (22413144144412), we get a palindrome (43857288275834).

The spelling of 21444144131422 in words is "twenty-one trillion, four hundred forty-four billion, one hundred forty-four million, one hundred thirty-one thousand, four hundred twenty-two".