21121123332 has 48 divisors (see below), whose sum is σ = 49769862912. Its totient is φ = 6970839840.

The previous prime is 21121123321. The next prime is 21121123337. The reversal of 21121123332 is 23332112112.

It is a super-2 number, since 2×21121123332² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21121123299 and 21121123308.

It is not an unprimeable number, because it can be changed into a prime (21121123337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3441907 + ... + 3448037.

It is an arithmetic number, because the mean of its divisors is an integer number (1036872144).

Almost surely, 2^21121123332 is an apocalyptic number.

It is an amenable number.

21121123332 is an abundant number, since it is smaller than the sum of its proper divisors (28648739580).

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

21121123332 is a wasteful number, since it uses less digits than its factorization.

21121123332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8928 (or 8926 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 21121123332 its reverse (23332112112), we get a palindrome (44453235444).

It can be divided in two parts, 21121 and 123332, that added together give a triangular number (144453 = T₅₃₇).

The spelling of 21121123332 in words is "twenty-one billion, one hundred twenty-one million, one hundred twenty-three thousand, three hundred thirty-two".