1001220111103 has 2 divisors, whose sum is σ = 1001220111104. Its totient is φ = 1001220111102.

The previous prime is 1001220111097. The next prime is 1001220111113. The reversal of 1001220111103 is 3011110221001.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3011110221001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001220111103 - 2²⁹ = 1000683240191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001220111113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610055551 + 500610055552.

It is an arithmetic number, because the mean of its divisors is an integer number (500610055552).

Almost surely, 2^{1001220111103} is an apocalyptic number.

1001220111103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001220111103 is an equidigital number, since it uses as much as digits as its factorization.

1001220111103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1001220111103 its reverse (3011110221001), we get a palindrome (4012330332104).

The spelling of 1001220111103 in words is "one trillion, one billion, two hundred twenty million, one hundred eleven thousand, one hundred three".