2102201221943 has 2 divisors, whose sum is σ = 2102201221944. Its totient is φ = 2102201221942.

The previous prime is 2102201221937. The next prime is 2102201222041. The reversal of 2102201221943 is 3491221022012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102201221943 - 2¹⁸ = 2102200959799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102201221643) 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 as a sum of consecutive naturals, namely, 1051100610971 + 1051100610972.

It is an arithmetic number, because the mean of its divisors is an integer number (1051100610972).

Almost surely, 2^{2102201221943} is an apocalyptic number.

2102201221943 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102201221943 is an equidigital number, since it uses as much as digits as its factorization.

2102201221943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 2102201221943 its reverse (3491221022012), we get a palindrome (5593422243955).

The spelling of 2102201221943 in words is "two trillion, one hundred two billion, two hundred one million, two hundred twenty-one thousand, nine hundred forty-three".