21104420113100 has 18 divisors (see below), whose sum is σ = 45796591645644. Its totient is φ = 8441768045200.

The previous prime is 21104420113069. The next prime is 21104420113109. The reversal of 21104420113100 is 131102440112.

It is a super-2 number, since 2×21104420113100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21104420113109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105522100466 + ... + 105522100665.

Almost surely, 2^{21104420113100} is an apocalyptic number.

21104420113100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21104420113100 is an abundant number, since it is smaller than the sum of its proper divisors (24692171532544).

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

21104420113100 is a wasteful number, since it uses less digits than its factorization.

21104420113100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211044201145 (or 211044201138 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21104420113100 its reverse (131102440112), we get a palindrome (21235522553212).

The spelling of 21104420113100 in words is "twenty-one trillion, one hundred four billion, four hundred twenty million, one hundred thirteen thousand, one hundred".