21120233320 has 32 divisors (see below), whose sum is σ = 47525940000. Its totient is φ = 8447130688.

The previous prime is 21120233293. The next prime is 21120233371. The reversal of 21120233320 is 2333202112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401931 + ... + 451429.

It is an arithmetic number, because the mean of its divisors is an integer number (1485185625).

Almost surely, 2^21120233320 is an apocalyptic number.

21120233320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120233320 is an abundant number, since it is smaller than the sum of its proper divisors (26405706680).

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

21120233320 is a wasteful number, since it uses less digits than its factorization.

21120233320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60177 (or 60173 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21120233320 its reverse (2333202112), we get a palindrome (23453435432).

The spelling of 21120233320 in words is "twenty-one billion, one hundred twenty million, two hundred thirty-three thousand, three hundred twenty".