21000132043321 has 8 divisors (see below), whose sum is σ = 21028483663040. Its totient is φ = 20971782035568.

The previous prime is 21000132043307. The next prime is 21000132043349. The reversal of 21000132043321 is 12334023100012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21000132043321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000132043292 and 21000132043301.

It is not an unprimeable number, because it can be changed into a prime (21000132043381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26918140 + ... + 27687298.

It is an arithmetic number, because the mean of its divisors is an integer number (2628560457880).

Almost surely, 2^{21000132043321} is an apocalyptic number.

It is an amenable number.

21000132043321 is a deficient number, since it is larger than the sum of its proper divisors (28351619719).

21000132043321 is an equidigital number, since it uses as much as digits as its factorization.

21000132043321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805983.

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

Adding to 21000132043321 its reverse (12334023100012), we get a palindrome (33334155143333).

The spelling of 21000132043321 in words is "twenty-one trillion, one hundred thirty-two million, forty-three thousand, three hundred twenty-one".