21202112220143 has 2 divisors, whose sum is σ = 21202112220144. Its totient is φ = 21202112220142.

The previous prime is 21202112220131. The next prime is 21202112220167. The reversal of 21202112220143 is 34102221120212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202112220143 - 2⁴⁰ = 20102600592367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202112220043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601056110071 + 10601056110072.

It is an arithmetic number, because the mean of its divisors is an integer number (10601056110072).

Almost surely, 2^{21202112220143} is an apocalyptic number.

21202112220143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202112220143 is an equidigital number, since it uses as much as digits as its factorization.

21202112220143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21202112220143 its reverse (34102221120212), we get a palindrome (55304333340355).

The spelling of 21202112220143 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, two hundred twenty thousand, one hundred forty-three".