1213554243223 has 48 divisors (see below), whose sum is σ = 1499213525760. Its totient is φ = 976067656704.

The previous prime is 1213554243211. The next prime is 1213554243227. The reversal of 1213554243223 is 3223424553121.

It is not a de Polignac number, because 1213554243223 - 2¹⁷ = 1213554112151 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 (1213554243227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 566286490 + ... + 566288632.

It is an arithmetic number, because the mean of its divisors is an integer number (31233615120).

Almost surely, 2^{1213554243223} is an apocalyptic number.

1213554243223 is a deficient number, since it is larger than the sum of its proper divisors (285659282537).

1213554243223 is a wasteful number, since it uses less digits than its factorization.

1213554243223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3896 (or 3889 counting only the distinct ones).

The product of its digits is 172800, while the sum is 37.

Adding to 1213554243223 its reverse (3223424553121), we get a palindrome (4436978796344).

The spelling of 1213554243223 in words is "one trillion, two hundred thirteen billion, five hundred fifty-four million, two hundred forty-three thousand, two hundred twenty-three".