1312122123223 has 4 divisors (see below), whose sum is σ = 1381181182360. Its totient is φ = 1243063064088.

The previous prime is 1312122123209. The next prime is 1312122123283. The reversal of 1312122123223 is 3223212212131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312122123223 - 2¹⁷ = 1312121992151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312122123203) 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, 34529529540 + ... + 34529529577.

It is an arithmetic number, because the mean of its divisors is an integer number (345295295590).

Almost surely, 2^{1312122123223} is an apocalyptic number.

1312122123223 is a deficient number, since it is larger than the sum of its proper divisors (69059059137).

1312122123223 is an equidigital number, since it uses as much as digits as its factorization.

1312122123223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69059059136.

The product of its digits is 1728, while the sum is 25.

Adding to 1312122123223 its reverse (3223212212131), we get a palindrome (4535334335354).

The spelling of 1312122123223 in words is "one trillion, three hundred twelve billion, one hundred twenty-two million, one hundred twenty-three thousand, two hundred twenty-three".