21212333132 has 12 divisors (see below), whose sum is σ = 37258564896. Its totient is φ = 10567028880.

The previous prime is 21212333113. The next prime is 21212333143. The reversal of 21212333132 is 23133321212.

It is a junction number, because it is equal to n+sod(n) for n = 21212333098 and 21212333107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9783203 + ... + 9785370.

It is an arithmetic number, because the mean of its divisors is an integer number (3104880408).

Almost surely, 2^21212333132 is an apocalyptic number.

It is an amenable number.

21212333132 is a deficient number, since it is larger than the sum of its proper divisors (16046231764).

21212333132 is a wasteful number, since it uses less digits than its factorization.

21212333132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19568848 (or 19568846 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

Adding to 21212333132 its reverse (23133321212), we get a palindrome (44345654344).

The spelling of 21212333132 in words is "twenty-one billion, two hundred twelve million, three hundred thirty-three thousand, one hundred thirty-two".