21003133332 has 12 divisors (see below), whose sum is σ = 49007311136. Its totient is φ = 7001044440.

The previous prime is 21003133303. The next prime is 21003133337. The reversal of 21003133332 is 23333130012.

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

It is a super-2 number, since 2×21003133332² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003133299 and 21003133308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003133337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875130544 + ... + 875130567.

Almost surely, 2^21003133332 is an apocalyptic number.

It is an amenable number.

21003133332 is an abundant number, since it is smaller than the sum of its proper divisors (28004177804).

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

21003133332 is a wasteful number, since it uses less digits than its factorization.

21003133332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750261118 (or 1750261116 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 21003133332 its reverse (23333130012), we get a palindrome (44336263344).

The spelling of 21003133332 in words is "twenty-one billion, three million, one hundred thirty-three thousand, three hundred thirty-two".