21331213144441 has 8 divisors (see below), whose sum is σ = 21766795868160. Its totient is φ = 20898098312112.

The previous prime is 21331213144433. The next prime is 21331213144459. The reversal of 21331213144441 is 14444131213312.

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 21331213144441 - 2³ = 21331213144433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21331213144397 and 21331213144406.

It is not an unprimeable number, because it can be changed into a prime (21331213144541) 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, 616955385 + ... + 616989958.

It is an arithmetic number, because the mean of its divisors is an integer number (2720849483520).

Almost surely, 2^{21331213144441} is an apocalyptic number.

It is an amenable number.

21331213144441 is a deficient number, since it is larger than the sum of its proper divisors (435582723719).

21331213144441 is a wasteful number, since it uses less digits than its factorization.

21331213144441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233945695.

The product of its digits is 27648, while the sum is 34.

Adding to 21331213144441 its reverse (14444131213312), we get a palindrome (35775344357753).

The spelling of 21331213144441 in words is "twenty-one trillion, three hundred thirty-one billion, two hundred thirteen million, one hundred forty-four thousand, four hundred forty-one".