201221168443 has 2 divisors, whose sum is σ = 201221168444. Its totient is φ = 201221168442.

The previous prime is 201221168437. The next prime is 201221168471. The reversal of 201221168443 is 344861122102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201221168443 - 2¹³ = 201221160251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201221168399 and 201221168408.

It is not a weakly prime, because it can be changed into another prime (201221168413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610584221 + 100610584222.

It is an arithmetic number, because the mean of its divisors is an integer number (100610584222).

Almost surely, 2^201221168443 is an apocalyptic number.

201221168443 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221168443 is an equidigital number, since it uses as much as digits as its factorization.

201221168443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

It can be divided in two parts, 201221 and 168443, that added together give a square (369664 = 608²).

The spelling of 201221168443 in words is "two hundred one billion, two hundred twenty-one million, one hundred sixty-eight thousand, four hundred forty-three".