1213423125233 has 4 divisors (see below), whose sum is σ = 1323734318448. Its totient is φ = 1103111932020.

The previous prime is 1213423125179. The next prime is 1213423125281. The reversal of 1213423125233 is 3325213243121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1213423125233 - 2¹⁰ = 1213423124209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213423125233.

It is not an unprimeable number, because it can be changed into a prime (1213423125293) 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 3 ways as a sum of consecutive naturals, for example, 55155596591 + ... + 55155596612.

It is an arithmetic number, because the mean of its divisors is an integer number (330933579612).

Almost surely, 2^{1213423125233} is an apocalyptic number.

It is an amenable number.

1213423125233 is a deficient number, since it is larger than the sum of its proper divisors (110311193215).

1213423125233 is a wasteful number, since it uses less digits than its factorization.

1213423125233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110311193214.

The product of its digits is 25920, while the sum is 32.

Adding to 1213423125233 its reverse (3325213243121), we get a palindrome (4538636368354).

The spelling of 1213423125233 in words is "one trillion, two hundred thirteen billion, four hundred twenty-three million, one hundred twenty-five thousand, two hundred thirty-three".