20321123440112 has 80 divisors (see below), whose sum is σ = 43326038786400. Its totient is φ = 9156511211520.

The previous prime is 20321123440097. The next prime is 20321123440127. The reversal of 20321123440112 is 21104432112302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20321123440097) and next prime (20321123440127).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16501064 + ... + 17689752.

It is an arithmetic number, because the mean of its divisors is an integer number (541575484830).

Almost surely, 2^{20321123440112} is an apocalyptic number.

20321123440112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20321123440112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21663019393200).

20321123440112 is an abundant number, since it is smaller than the sum of its proper divisors (23004915346288).

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

20321123440112 is a wasteful number, since it uses less digits than its factorization.

20321123440112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189554 (or 1189548 counting only the distinct ones).

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

Adding to 20321123440112 its reverse (21104432112302), we get a palindrome (41425555552414).

The spelling of 20321123440112 in words is "twenty trillion, three hundred twenty-one billion, one hundred twenty-three million, four hundred forty thousand, one hundred twelve".