21221354422336 has 28 divisors (see below), whose sum is σ = 42222236378320. Its totient is φ = 10582680689280.

The previous prime is 21221354422319. The next prime is 21221354422339. The reversal of 21221354422336 is 63322445312212.

It is not an unprimeable number, because it can be changed into a prime (21221354422339) 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 3 ways as a sum of consecutive naturals, for example, 437421210 + ... + 437469721.

Almost surely, 2^{21221354422336} is an apocalyptic number.

It is an amenable number.

21221354422336 is a deficient number, since it is larger than the sum of its proper divisors (21000881955984).

21221354422336 is an equidigital number, since it uses as much as digits as its factorization.

21221354422336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874891322 (or 874891312 counting only the distinct ones).

The product of its digits is 414720, while the sum is 40.

Adding to 21221354422336 its reverse (63322445312212), we get a palindrome (84543799734548).

The spelling of 21221354422336 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred fifty-four million, four hundred twenty-two thousand, three hundred thirty-six".