21120020332 has 12 divisors (see below), whose sum is σ = 36966511456. Its totient is φ = 10558159920.

The previous prime is 21120020281. The next prime is 21120020333. The reversal of 21120020332 is 23302002112.

It is not an unprimeable number, because it can be changed into a prime (21120020333) 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, 436719 + ... + 482662.

Almost surely, 2^21120020332 is an apocalyptic number.

It is an amenable number.

21120020332 is a deficient number, since it is larger than the sum of its proper divisors (15846491124).

21120020332 is a wasteful number, since it uses less digits than its factorization.

21120020332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925128 (or 925126 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21120020332 its reverse (23302002112), we get a palindrome (44422022444).

The spelling of 21120020332 in words is "twenty-one billion, one hundred twenty million, twenty thousand, three hundred thirty-two".