1213502110243 has 16 divisors (see below), whose sum is σ = 1258873682400. Its totient is φ = 1169011733760.

The previous prime is 1213502110229. The next prime is 1213502110259. The reversal of 1213502110243 is 3420112053121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213502110243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213502110213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2358223 + ... + 2826343.

It is an arithmetic number, because the mean of its divisors is an integer number (78679605150).

Almost surely, 2^{1213502110243} is an apocalyptic number.

1213502110243 is a deficient number, since it is larger than the sum of its proper divisors (45371572157).

1213502110243 is an equidigital number, since it uses as much as digits as its factorization.

1213502110243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469062.

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

Adding to 1213502110243 its reverse (3420112053121), we get a palindrome (4633614163364).

The spelling of 1213502110243 in words is "one trillion, two hundred thirteen billion, five hundred two million, one hundred ten thousand, two hundred forty-three".