1213242135736 has 16 divisors (see below), whose sum is σ = 2279578132800. Its totient is φ = 605354633664.

The previous prime is 1213242135733. The next prime is 1213242135739. The reversal of 1213242135736 is 6375312423121.

It is an interprime number because it is at equal distance from previous prime (1213242135733) and next prime (1213242135739).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213242135733) 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 3 ways as a sum of consecutive naturals, for example, 158300205 + ... + 158307868.

It is an arithmetic number, because the mean of its divisors is an integer number (142473633300).

Almost surely, 2^{1213242135736} is an apocalyptic number.

It is an amenable number.

1213242135736 is a deficient number, since it is larger than the sum of its proper divisors (1066335997064).

1213242135736 is a wasteful number, since it uses less digits than its factorization.

1213242135736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316608558 (or 316608554 counting only the distinct ones).

The product of its digits is 181440, while the sum is 40.

Adding to 1213242135736 its reverse (6375312423121), we get a palindrome (7588554558857).

The spelling of 1213242135736 in words is "one trillion, two hundred thirteen billion, two hundred forty-two million, one hundred thirty-five thousand, seven hundred thirty-six".