21133440120 has 64 divisors (see below), whose sum is σ = 68277273120. Its totient is φ = 5202077184.

The previous prime is 21133440113. The next prime is 21133440121. The reversal of 21133440120 is 2104433112.

It is a super-2 number, since 2×21133440120² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133440121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6771979 + ... + 6775098.

Almost surely, 2^21133440120 is an apocalyptic number.

21133440120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21133440120 is an abundant number, since it is smaller than the sum of its proper divisors (47143833000).

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

21133440120 is a wasteful number, since it uses less digits than its factorization.

21133440120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13547104 (or 13547100 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21133440120 its reverse (2104433112), we get a palindrome (23237873232).

The spelling of 21133440120 in words is "twenty-one billion, one hundred thirty-three million, four hundred forty thousand, one hundred twenty".