1312122223 has 4 divisors (see below), whose sum is σ = 1314202288. Its totient is φ = 1310042160.

The previous prime is 1312122211. The next prime is 1312122233. The reversal of 1312122223 is 3222212131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3222212131 = 449 ⋅7176419.

It is a cyclic number.

It is not a de Polignac number, because 1312122223 - 2⁵ = 1312122191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312122223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312122233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1039086 + ... + 1040347.

It is an arithmetic number, because the mean of its divisors is an integer number (328550572).

Almost surely, 2^1312122223 is an apocalyptic number.

1312122223 is a deficient number, since it is larger than the sum of its proper divisors (2080065).

1312122223 is an equidigital number, since it uses as much as digits as its factorization.

1312122223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080064.

The product of its digits is 288, while the sum is 19.

The square root of 1312122223 is about 36223.2276723099. The cubic root of 1312122223 is about 1094.7747284409.

Adding to 1312122223 its reverse (3222212131), we get a palindrome (4534334354).

It can be divided in two parts, 13121 and 22223, that added together give a square (35344 = 188²).

The spelling of 1312122223 in words is "one billion, three hundred twelve million, one hundred twenty-two thousand, two hundred twenty-three".