21440903811321 has 8 divisors (see below), whose sum is σ = 28587991592160. Its totient is φ = 14293875952352.

The previous prime is 21440903811317. The next prime is 21440903811323. The reversal of 21440903811321 is 12311830904412.

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 21440903811321 - 2² = 21440903811317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21440903811321.

It is not an unprimeable number, because it can be changed into a prime (21440903811323) 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 7 ways as a sum of consecutive naturals, for example, 14138811 + ... + 15581648.

It is an arithmetic number, because the mean of its divisors is an integer number (3573498949020).

Almost surely, 2^{21440903811321} is an apocalyptic number.

It is an amenable number.

21440903811321 is a deficient number, since it is larger than the sum of its proper divisors (7147087780839).

21440903811321 is a wasteful number, since it uses less digits than its factorization.

21440903811321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29960935.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 21440903811321 in words is "twenty-one trillion, four hundred forty billion, nine hundred three million, eight hundred eleven thousand, three hundred twenty-one".