221231221111143 has 12 divisors (see below), whose sum is σ = 319962251748568. Its totient is φ = 147300076059120.

The previous prime is 221231221111111. The next prime is 221231221111213. The reversal of 221231221111143 is 341111122132122.

221231221111143 is a `hidden beast` number, since 2 + 21 + 2 + 312 + 211 + 1 + 114 + 3 = 666.

It is not a de Polignac number, because 221231221111143 - 2⁵ = 221231221111111 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 (221231221113143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15617049328 + ... + 15617063493.

Almost surely, 2^{221231221111143} is an apocalyptic number.

221231221111143 is a deficient number, since it is larger than the sum of its proper divisors (98731030637425).

221231221111143 is a wasteful number, since it uses less digits than its factorization.

221231221111143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31234113614 (or 31234113611 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

Adding to 221231221111143 its reverse (341111122132122), we get a palindrome (562342343243265).

The spelling of 221231221111143 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, two hundred twenty-one million, one hundred eleven thousand, one hundred forty-three".