21212032032 has 96 divisors (see below), whose sum is σ = 61893538560. Its totient is φ = 7067808000.

The previous prime is 21212032027. The next prime is 21212032043. The reversal of 21212032032 is 23023021212.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a junction number, because it is equal to n+sod(n) for n = 21212031996 and 21212032014.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3853282 + ... + 3858782.

It is an arithmetic number, because the mean of its divisors is an integer number (644724360).

Almost surely, 2^21212032032 is an apocalyptic number.

It is an amenable number.

21212032032 is an abundant number, since it is smaller than the sum of its proper divisors (40681506528).

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

21212032032 is a wasteful number, since it uses less digits than its factorization.

21212032032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9983 (or 9969 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21212032032 its reverse (23023021212), we get a palindrome (44235053244).

The spelling of 21212032032 in words is "twenty-one billion, two hundred twelve million, thirty-two thousand, thirty-two".