21113132110044 has 192 divisors, whose sum is σ = 56594012160000. Its totient is φ = 6072093331200.

The previous prime is 21113132110043. The next prime is 21113132110051. The reversal of 21113132110044 is 44001123131112.

It is a junction number, because it is equal to n+sod(n) for n = 21113132109996 and 21113132110023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113132110043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 327552019 + ... + 327616469.

It is an arithmetic number, because the mean of its divisors is an integer number (294760480000).

Almost surely, 2^{21113132110044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21113132110044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28297006080000).

21113132110044 is an abundant number, since it is smaller than the sum of its proper divisors (35480880049956).

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

21113132110044 is a wasteful number, since it uses less digits than its factorization.

21113132110044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65968 (or 65966 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 21113132110044 its reverse (44001123131112), we get a palindrome (65114255241156).

The spelling of 21113132110044 in words is "twenty-one trillion, one hundred thirteen billion, one hundred thirty-two million, one hundred ten thousand, forty-four".