21321210203332 has 48 divisors (see below), whose sum is σ = 41052672748080. Its totient is φ = 9629681098752.

The previous prime is 21321210203323. The next prime is 21321210203339. The reversal of 21321210203332 is 23330201212312.

It can be written as a sum of positive squares in 8 ways, for example, as 370303892676 + 20950906310656 = 608526^2 + 4577216^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21321210203297 and 21321210203306.

It is not an unprimeable number, because it can be changed into a prime (21321210203339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23298523 + ... + 24196354.

It is an arithmetic number, because the mean of its divisors is an integer number (855264015585).

Almost surely, 2^{21321210203332} is an apocalyptic number.

It is an amenable number.

21321210203332 is a deficient number, since it is larger than the sum of its proper divisors (19731462544748).

21321210203332 is a wasteful number, since it uses less digits than its factorization.

21321210203332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47495080 (or 47495078 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21321210203332 its reverse (23330201212312), we get a palindrome (44651411415644).

The spelling of 21321210203332 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred ten million, two hundred three thousand, three hundred thirty-two".