221113212143 has 4 divisors (see below), whose sum is σ = 221586688440. Its totient is φ = 220639735848.

The previous prime is 221113212113. The next prime is 221113212209. The reversal of 221113212143 is 341212311122.

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 221113212143 - 2⁶ = 221113212079 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 (221113212113) 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, 236737448 + ... + 236738381.

It is an arithmetic number, because the mean of its divisors is an integer number (55396672110).

Almost surely, 2^221113212143 is an apocalyptic number.

221113212143 is a deficient number, since it is larger than the sum of its proper divisors (473476297).

221113212143 is an equidigital number, since it uses as much as digits as its factorization.

221113212143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473476296.

The product of its digits is 576, while the sum is 23.

Adding to 221113212143 its reverse (341212311122), we get a palindrome (562325523265).

The spelling of 221113212143 in words is "two hundred twenty-one billion, one hundred thirteen million, two hundred twelve thousand, one hundred forty-three".