221021411304143 has 16 divisors (see below), whose sum is σ = 244982770845696. Its totient is φ = 198336003719040.

The previous prime is 221021411304037. The next prime is 221021411304149. The reversal of 221021411304143 is 341403114120122.

It is a cyclic number.

It is not a de Polignac number, because 221021411304143 - 2⁸ = 221021411303887 is a prime.

It is a super-2 number, since 2×221021411304143² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021411304149) 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 15 ways as a sum of consecutive naturals, for example, 908676071 + ... + 908919272.

It is an arithmetic number, because the mean of its divisors is an integer number (15311423177856).

Almost surely, 2^{221021411304143} is an apocalyptic number.

221021411304143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

221021411304143 is a deficient number, since it is larger than the sum of its proper divisors (23961359541553).

221021411304143 is a wasteful number, since it uses less digits than its factorization.

221021411304143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1817595694.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 221021411304143 its reverse (341403114120122), we get a palindrome (562424525424265).

The spelling of 221021411304143 in words is "two hundred twenty-one trillion, twenty-one billion, four hundred eleven million, three hundred four thousand, one hundred forty-three".