221231201320183 has 2 divisors, whose sum is σ = 221231201320184. Its totient is φ = 221231201320182.

The previous prime is 221231201320127. The next prime is 221231201320243. The reversal of 221231201320183 is 381023102132122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221231201320183 - 2¹⁷ = 221231201189111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221231201320483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110615600660091 + 110615600660092.

It is an arithmetic number, because the mean of its divisors is an integer number (110615600660092).

Almost surely, 2^{221231201320183} is an apocalyptic number.

221231201320183 is a deficient number, since it is larger than the sum of its proper divisors (1).

221231201320183 is an equidigital number, since it uses as much as digits as its factorization.

221231201320183 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 221231201320183 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, two hundred one million, three hundred twenty thousand, one hundred eighty-three".