1243230211105 has 16 divisors (see below), whose sum is σ = 1512839680704. Its totient is φ = 980705269440.

The previous prime is 1243230211061. The next prime is 1243230211151. The reversal of 1243230211105 is 5011120323421.

It is not a de Polignac number, because 1243230211105 - 2¹⁹ = 1243229686817 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1243230211105.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 5941947 + ... + 6147616.

It is an arithmetic number, because the mean of its divisors is an integer number (94552480044).

Almost surely, 2^{1243230211105} is an apocalyptic number.

It is an amenable number.

1243230211105 is a deficient number, since it is larger than the sum of its proper divisors (269609469599).

1243230211105 is a wasteful number, since it uses less digits than its factorization.

1243230211105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12089856.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1243230211105 its reverse (5011120323421), we get a palindrome (6254350534526).

The spelling of 1243230211105 in words is "one trillion, two hundred forty-three billion, two hundred thirty million, two hundred eleven thousand, one hundred five".