221830232171833 has 2 divisors, whose sum is σ = 221830232171834. Its totient is φ = 221830232171832.

The previous prime is 221830232171831. The next prime is 221830232171851. The reversal of 221830232171833 is 338171232038122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213168088476729 + 8662143695104 = 14600277^2 + 2943152^2 .

It is a cyclic number.

It is not a de Polignac number, because 221830232171833 - 2¹ = 221830232171831 is a prime.

Together with 221830232171831, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221830232171831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110915116085916 + 110915116085917.

It is an arithmetic number, because the mean of its divisors is an integer number (110915116085917).

Almost surely, 2^{221830232171833} is an apocalyptic number.

It is an amenable number.

221830232171833 is a deficient number, since it is larger than the sum of its proper divisors (1).

221830232171833 is an equidigital number, since it uses as much as digits as its factorization.

221830232171833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 221830232171833 in words is "two hundred twenty-one trillion, eight hundred thirty billion, two hundred thirty-two million, one hundred seventy-one thousand, eight hundred thirty-three".