21413211110544 has 240 divisors, whose sum is σ = 61175060920512. Its totient is φ = 6449304576000.

The previous prime is 21413211110497. The next prime is 21413211110569. The reversal of 21413211110544 is 44501111231412.

It is a super-3 number, since 3×21413211110544³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 729243607 + ... + 729272969.

Almost surely, 2^{21413211110544} is an apocalyptic number.

21413211110544 is a gapful number since it is divisible by the number (24) 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 21413211110544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30587530460256).

21413211110544 is an abundant number, since it is smaller than the sum of its proper divisors (39761849809968).

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

21413211110544 is a wasteful number, since it uses less digits than its factorization.

21413211110544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30158 (or 30141 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

Adding to 21413211110544 its reverse (44501111231412), we get a palindrome (65914322341956).

The spelling of 21413211110544 in words is "twenty-one trillion, four hundred thirteen billion, two hundred eleven million, one hundred ten thousand, five hundred forty-four".