1213443353345 has 32 divisors (see below), whose sum is σ = 1550319160320. Its totient is φ = 908603873280.

The previous prime is 1213443353303. The next prime is 1213443353347. The reversal of 1213443353345 is 5433533443121.

It is a de Polignac number, because none of the positive numbers 2^k-1213443353345 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213443353347) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 18372341 + ... + 18438269.

It is an arithmetic number, because the mean of its divisors is an integer number (48447473760).

Almost surely, 2^{1213443353345} is an apocalyptic number.

It is an amenable number.

1213443353345 is a deficient number, since it is larger than the sum of its proper divisors (336875806975).

1213443353345 is a wasteful number, since it uses less digits than its factorization.

1213443353345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67145.

The product of its digits is 777600, while the sum is 41.

Adding to 1213443353345 its reverse (5433533443121), we get a palindrome (6646976796466).

The spelling of 1213443353345 in words is "one trillion, two hundred thirteen billion, four hundred forty-three million, three hundred fifty-three thousand, three hundred forty-five".