21444013034321 has 4 divisors (see below), whose sum is σ = 21563811990000. Its totient is φ = 21324214078644.

The previous prime is 21444013034317. The next prime is 21444013034329. The reversal of 21444013034321 is 12343031044412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21444013034321 - 2² = 21444013034317 is a prime.

It is a super-2 number, since 2×21444013034321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21444013034329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59899477571 + ... + 59899477928.

It is an arithmetic number, because the mean of its divisors is an integer number (5390952997500).

Almost surely, 2^{21444013034321} is an apocalyptic number.

It is an amenable number.

21444013034321 is a deficient number, since it is larger than the sum of its proper divisors (119798955679).

21444013034321 is a wasteful number, since it uses less digits than its factorization.

21444013034321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119798955678.

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21444013034321 its reverse (12343031044412), we get a palindrome (33787044078733).

The spelling of 21444013034321 in words is "twenty-one trillion, four hundred forty-four billion, thirteen million, thirty-four thousand, three hundred twenty-one".