221321104202141 has 4 divisors (see below), whose sum is σ = 221321391573984. Its totient is φ = 221320816830300.

The previous prime is 221321104202113. The next prime is 221321104202179. The reversal of 221321104202141 is 141202401123122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221321104202141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221321104202141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321104202101) 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 3 ways as a sum of consecutive naturals, for example, 142527575 + ... + 144072036.

It is an arithmetic number, because the mean of its divisors is an integer number (55330347893496).

Almost surely, 2^{221321104202141} is an apocalyptic number.

It is an amenable number.

221321104202141 is a deficient number, since it is larger than the sum of its proper divisors (287371843).

221321104202141 is an equidigital number, since it uses as much as digits as its factorization.

221321104202141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287371842.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 221321104202141 its reverse (141202401123122), we get a palindrome (362523505325263).

The spelling of 221321104202141 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, one hundred four million, two hundred two thousand, one hundred forty-one".