210220111243 has 2 divisors, whose sum is σ = 210220111244. Its totient is φ = 210220111242.

The previous prime is 210220111207. The next prime is 210220111253. The reversal of 210220111243 is 342111022012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210220111243 - 2¹⁷ = 210219980171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210220111243.

It is not a weakly prime, because it can be changed into another prime (210220111253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110055621 + 105110055622.

It is an arithmetic number, because the mean of its divisors is an integer number (105110055622).

Almost surely, 2^210220111243 is an apocalyptic number.

210220111243 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220111243 is an equidigital number, since it uses as much as digits as its factorization.

210220111243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 210220111243 its reverse (342111022012), we get a palindrome (552331133255).

The spelling of 210220111243 in words is "two hundred ten billion, two hundred twenty million, one hundred eleven thousand, two hundred forty-three".