21023030120 has 32 divisors (see below), whose sum is σ = 47306223720. Its totient is φ = 8408428800.

The previous prime is 21023030089. The next prime is 21023030129. The reversal of 21023030120 is 2103032012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20898171844 + 124858276 = 144562^2 + 11174^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21023030095 and 21023030104.

It is not an unprimeable number, because it can be changed into a prime (21023030129) 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, 619514 + ... + 652566.

Almost surely, 2^21023030120 is an apocalyptic number.

21023030120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023030120 is an abundant number, since it is smaller than the sum of its proper divisors (26283193600).

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

21023030120 is a wasteful number, since it uses less digits than its factorization.

21023030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48965 (or 48961 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21023030120 its reverse (2103032012), we get a palindrome (23126062132).

The spelling of 21023030120 in words is "twenty-one billion, twenty-three million, thirty thousand, one hundred twenty".