21022242344321 has 4 divisors (see below), whose sum is σ = 21036730452144. Its totient is φ = 21007754236500.

The previous prime is 21022242344287. The next prime is 21022242344387. The reversal of 21022242344321 is 12344324222012.

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 21022242344321 - 2³⁸ = 20747364437377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022242344021) 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, 7244051735 + ... + 7244054636.

It is an arithmetic number, because the mean of its divisors is an integer number (5259182613036).

Almost surely, 2^{21022242344321} is an apocalyptic number.

It is an amenable number.

21022242344321 is a deficient number, since it is larger than the sum of its proper divisors (14488107823).

21022242344321 is a wasteful number, since it uses less digits than its factorization.

21022242344321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14488107822.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21022242344321 its reverse (12344324222012), we get a palindrome (33366566566333).

The spelling of 21022242344321 in words is "twenty-one trillion, twenty-two billion, two hundred forty-two million, three hundred forty-four thousand, three hundred twenty-one".