21102113120 has 48 divisors (see below), whose sum is σ = 54385905168. Its totient is φ = 7673495040.

The previous prime is 21102113119. The next prime is 21102113129. The reversal of 21102113120 is 2131120112.

It is a super-2 number, since 2×21102113120² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21102113095 and 21102113104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102113129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5993159 + ... + 5996678.

It is an arithmetic number, because the mean of its divisors is an integer number (1133039691).

Almost surely, 2^21102113120 is an apocalyptic number.

21102113120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102113120 is an abundant number, since it is smaller than the sum of its proper divisors (33283792048).

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

21102113120 is a wasteful number, since it uses less digits than its factorization.

21102113120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11989863 (or 11989855 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21102113120 its reverse (2131120112), we get a palindrome (23233233232).

The spelling of 21102113120 in words is "twenty-one billion, one hundred two million, one hundred thirteen thousand, one hundred twenty".