21212132332 has 12 divisors (see below), whose sum is σ = 37122495256. Its totient is φ = 10605705120.

The previous prime is 21212132327. The next prime is 21212132339. The reversal of 21212132332 is 23323121212.

It is not an unprimeable number, because it can be changed into a prime (21212132339) 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, 75928 + ... + 219520.

Almost surely, 2^21212132332 is an apocalyptic number.

It is an amenable number.

21212132332 is a deficient number, since it is larger than the sum of its proper divisors (15910362924).

21212132332 is a wasteful number, since it uses less digits than its factorization.

21212132332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180528 (or 180526 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

Adding to 21212132332 its reverse (23323121212), we get a palindrome (44535253544).

The spelling of 21212132332 in words is "twenty-one billion, two hundred twelve million, one hundred thirty-two thousand, three hundred thirty-two".