1231042035205 has 8 divisors (see below), whose sum is σ = 1564147527192. Its totient is φ = 926902238208.

The previous prime is 1231042035203. The next prime is 1231042035217. The reversal of 1231042035205 is 5025302401321.

It can be written as a sum of positive squares in 4 ways, for example, as 593728809444 + 637313225761 = 770538^2 + 798319^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231042035205 - 2¹ = 1231042035203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231042035203) 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 in 7 ways as a sum of consecutive naturals, for example, 7241423652 + ... + 7241423821.

It is an arithmetic number, because the mean of its divisors is an integer number (195518440899).

Almost surely, 2^{1231042035205} is an apocalyptic number.

It is an amenable number.

1231042035205 is a deficient number, since it is larger than the sum of its proper divisors (333105491987).

1231042035205 is a wasteful number, since it uses less digits than its factorization.

1231042035205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14482847495.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 1231042035205 its reverse (5025302401321), we get a palindrome (6256344436526).

The spelling of 1231042035205 in words is "one trillion, two hundred thirty-one billion, forty-two million, thirty-five thousand, two hundred five".