21102210222143 has 4 divisors (see below), whose sum is σ = 21102651655680. Its totient is φ = 21101768788608.

The previous prime is 21102210222109. The next prime is 21102210222161. The reversal of 21102210222143 is 34122201220112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21102210222143 - 2¹⁰ = 21102210221119 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 (21102210221143) 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, 220645055 + ... + 220740672.

It is an arithmetic number, because the mean of its divisors is an integer number (5275662913920).

Almost surely, 2^{21102210222143} is an apocalyptic number.

21102210222143 is a deficient number, since it is larger than the sum of its proper divisors (441433537).

21102210222143 is an equidigital number, since it uses as much as digits as its factorization.

21102210222143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441433536.

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

Adding to 21102210222143 its reverse (34122201220112), we get a palindrome (55224411442255).

The spelling of 21102210222143 in words is "twenty-one trillion, one hundred two billion, two hundred ten million, two hundred twenty-two thousand, one hundred forty-three".