221221402043143 has 16 divisors (see below), whose sum is σ = 227120100793920. Its totient is φ = 215404845868800.

The previous prime is 221221402043123. The next prime is 221221402043189. The reversal of 221221402043143 is 341340204122122.

221221402043143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221221402043143 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 (221221402043123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33868068 + ... + 39868393.

It is an arithmetic number, because the mean of its divisors is an integer number (14195006299620).

Almost surely, 2^{221221402043143} is an apocalyptic number.

221221402043143 is a deficient number, since it is larger than the sum of its proper divisors (5898698750777).

221221402043143 is a wasteful number, since it uses less digits than its factorization.

221221402043143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73737018.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 221221402043143 its reverse (341340204122122), we get a palindrome (562561606165265).

The spelling of 221221402043143 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, four hundred two million, forty-three thousand, one hundred forty-three".