1312312223 has 4 divisors (see below), whose sum is σ = 1312414920. Its totient is φ = 1312209528.

The previous prime is 1312312139. The next prime is 1312312247. The reversal of 1312312223 is 3222132131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3222132131 = 59 ⋅54612409.

It is a cyclic number.

It is not a de Polignac number, because 1312312223 - 2¹⁰ = 1312311199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312312195 and 1312312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312312823) 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 3 ways as a sum of consecutive naturals, for example, 28913 + ... + 58826.

It is an arithmetic number, because the mean of its divisors is an integer number (328103730).

Almost surely, 2^1312312223 is an apocalyptic number.

1312312223 is a deficient number, since it is larger than the sum of its proper divisors (102697).

1312312223 is an equidigital number, since it uses as much as digits as its factorization.

1312312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102696.

The product of its digits is 432, while the sum is 20.

The square root of 1312312223 is about 36225.8502039635. The cubic root of 1312312223 is about 1094.8275683252.

Adding to 1312312223 its reverse (3222132131), we get a palindrome (4534444354).

The spelling of 1312312223 in words is "one billion, three hundred twelve million, three hundred twelve thousand, two hundred twenty-three".