21212010331232 has 24 divisors (see below), whose sum is σ = 47727023245776. Its totient is φ = 9090861570432.

The previous prime is 21212010331223. The next prime is 21212010331243. The reversal of 21212010331232 is 23213301021212.

It is a junction number, because it is equal to n+sod(n) for n = 21212010331198 and 21212010331207.

It is a congruent number.

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, 47348237123 + ... + 47348237570.

It is an arithmetic number, because the mean of its divisors is an integer number (1988625968574).

Almost surely, 2^{21212010331232} is an apocalyptic number.

It is an amenable number.

21212010331232 is an abundant number, since it is smaller than the sum of its proper divisors (26515012914544).

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

21212010331232 is an equidigital number, since it uses as much as digits as its factorization.

21212010331232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94696474710 (or 94696474702 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21212010331232 its reverse (23213301021212), we get a palindrome (44425311352444).

The spelling of 21212010331232 in words is "twenty-one trillion, two hundred twelve billion, ten million, three hundred thirty-one thousand, two hundred thirty-two".