21120133332 has 12 divisors (see below), whose sum is σ = 49280311136. Its totient is φ = 7040044440.

The previous prime is 21120133303. The next prime is 21120133337. The reversal of 21120133332 is 23333102112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×21120133332² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21120133299 and 21120133308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120133337) 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 3 ways as a sum of consecutive naturals, for example, 880005544 + ... + 880005567.

Almost surely, 2^21120133332 is an apocalyptic number.

It is an amenable number.

21120133332 is an abundant number, since it is smaller than the sum of its proper divisors (28160177804).

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

21120133332 is a wasteful number, since it uses less digits than its factorization.

21120133332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760011118 (or 1760011116 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21120133332 its reverse (23333102112), we get a palindrome (44453235444).

The spelling of 21120133332 in words is "twenty-one billion, one hundred twenty million, one hundred thirty-three thousand, three hundred thirty-two".