21243132021332 has 48 divisors (see below), whose sum is σ = 41205968739264. Its totient is φ = 9520053984000.

The previous prime is 21243132021329. The next prime is 21243132021341. The reversal of 21243132021332 is 23312023134212.

It is a junction number, because it is equal to n+sod(n) for n = 21243132021295 and 21243132021304.

It is a congruent number.

It is an unprimeable number.

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, 23161394 + ... + 24061097.

It is an arithmetic number, because the mean of its divisors is an integer number (858457682068).

Almost surely, 2^{21243132021332} is an apocalyptic number.

It is an amenable number.

21243132021332 is a deficient number, since it is larger than the sum of its proper divisors (19962836717932).

21243132021332 is a wasteful number, since it uses less digits than its factorization.

21243132021332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47222760 (or 47222758 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 21243132021332 its reverse (23312023134212), we get a palindrome (44555155155544).

The spelling of 21243132021332 in words is "twenty-one trillion, two hundred forty-three billion, one hundred thirty-two million, twenty-one thousand, three hundred thirty-two".