21222001043143 has 8 divisors (see below), whose sum is σ = 21250967035712. Its totient is φ = 21193050443616.

The previous prime is 21222001043123. The next prime is 21222001043149. The reversal of 21222001043143 is 34134010022212.

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 21222001043143 - 2⁹ = 21222001042631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222001043149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087680 + ... + 6605077.

It is an arithmetic number, because the mean of its divisors is an integer number (2656370879464).

Almost surely, 2^{21222001043143} is an apocalyptic number.

21222001043143 is a deficient number, since it is larger than the sum of its proper divisors (28965992569).

21222001043143 is an equidigital number, since it uses as much as digits as its factorization.

21222001043143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696521.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21222001043143 its reverse (34134010022212), we get a palindrome (55356011065355).

The spelling of 21222001043143 in words is "twenty-one trillion, two hundred twenty-two billion, one million, forty-three thousand, one hundred forty-three".