21321142334144 has 56 divisors (see below), whose sum is σ = 43521498314208. Its totient is φ = 10356008785920.

The previous prime is 21321142334137. The next prime is 21321142334197. The reversal of 21321142334144 is 44143324112312.

It is a super-2 number, since 2×21321142334144² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5640389 + ... + 8628804.

Almost surely, 2^{21321142334144} is an apocalyptic number.

It is an amenable number.

21321142334144 is an abundant number, since it is smaller than the sum of its proper divisors (22200355980064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21321142334144 is a wasteful number, since it uses less digits than its factorization.

21321142334144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14269873 (or 14269863 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

Adding to 21321142334144 its reverse (44143324112312), we get a palindrome (65464466446456).

The spelling of 21321142334144 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred forty-two million, three hundred thirty-four thousand, one hundred forty-four".