21033133120 has 56 divisors (see below), whose sum is σ = 50832739584. Its totient is φ = 8287673856.

The previous prime is 21033133117. The next prime is 21033133129. The reversal of 21033133120 is 2133133012.

It is not an unprimeable number, because it can be changed into a prime (21033133129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469072 + ... + 511951.

Almost surely, 2^21033133120 is an apocalyptic number.

21033133120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033133120 is an abundant number, since it is smaller than the sum of its proper divisors (29799606464).

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

21033133120 is an equidigital number, since it uses as much as digits as its factorization.

21033133120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981107 (or 981097 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21033133120 its reverse (2133133012), we get a palindrome (23166266132).

The spelling of 21033133120 in words is "twenty-one billion, thirty-three million, one hundred thirty-three thousand, one hundred twenty".