21130330120 has 32 divisors (see below), whose sum is σ = 47589900120. Its totient is φ = 8443837440.

The previous prime is 21130330099. The next prime is 21130330127. The reversal of 21130330120 is 2103303112.

It can be written as a sum of positive squares in 4 ways, for example, as 20236200516 + 894129604 = 142254^2 + 29902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21130330094 and 21130330103.

It is not an unprimeable number, because it can be changed into a prime (21130330127) 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, 217857 + ... + 299536.

Almost surely, 2^21130330120 is an apocalyptic number.

21130330120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21130330120 is an abundant number, since it is smaller than the sum of its proper divisors (26459570000).

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

21130330120 is a wasteful number, since it uses less digits than its factorization.

21130330120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518425 (or 518421 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21130330120 its reverse (2103303112), we get a palindrome (23233633232).

The spelling of 21130330120 in words is "twenty-one billion, one hundred thirty million, three hundred thirty thousand, one hundred twenty".