21211120332 has 36 divisors (see below), whose sum is σ = 54002745160. Its totient is φ = 7019505792.

The previous prime is 21211120331. The next prime is 21211120349. The reversal of 21211120332 is 23302111212.

21211120332 is a `hidden beast` number, since 2 + 1 + 211 + 120 + 332 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21211120331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2114413 + ... + 2124420.

Almost surely, 2^21211120332 is an apocalyptic number.

It is an amenable number.

21211120332 is an abundant number, since it is smaller than the sum of its proper divisors (32791624828).

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

21211120332 is a wasteful number, since it uses less digits than its factorization.

21211120332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238982 (or 4238977 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21211120332 its reverse (23302111212), we get a palindrome (44513231544).

The spelling of 21211120332 in words is "twenty-one billion, two hundred eleven million, one hundred twenty thousand, three hundred thirty-two".