21311332032443 has 8 divisors (see below), whose sum is σ = 21333713715600. Its totient is φ = 21288953001888.

The previous prime is 21311332032439. The next prime is 21311332032503. The reversal of 21311332032443 is 34423023311312.

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

It is a cyclic number.

It is not a de Polignac number, because 21311332032443 - 2² = 21311332032439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21311332032943) 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, 15623288 + ... + 16932506.

It is an arithmetic number, because the mean of its divisors is an integer number (2666714214450).

Almost surely, 2^{21311332032443} is an apocalyptic number.

21311332032443 is a deficient number, since it is larger than the sum of its proper divisors (22381683157).

21311332032443 is a wasteful number, since it uses less digits than its factorization.

21311332032443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326301.

The product of its (nonzero) digits is 31104, while the sum is 32.

Adding to 21311332032443 its reverse (34423023311312), we get a palindrome (55734355343755).

The spelling of 21311332032443 in words is "twenty-one trillion, three hundred eleven billion, three hundred thirty-two million, thirty-two thousand, four hundred forty-three".