1312212323 has 4 divisors (see below), whose sum is σ = 1313476320. Its totient is φ = 1310948328.

The previous prime is 1312212311. The next prime is 1312212331. The reversal of 1312212323 is 3232122131.

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 1312212323 - 2⁶ = 1312212259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312212295 and 1312212304.

It is not an unprimeable number, because it can be changed into a prime (1312211323) 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, 630440 + ... + 632517.

It is an arithmetic number, because the mean of its divisors is an integer number (328369080).

Almost surely, 2^1312212323 is an apocalyptic number.

1312212323 is a deficient number, since it is larger than the sum of its proper divisors (1263997).

1312212323 is a wasteful number, since it uses less digits than its factorization.

1312212323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263996.

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

The square root of 1312212323 is about 36224.4713280953. The cubic root of 1312212323 is about 1094.7997863061.

Adding to 1312212323 its reverse (3232122131), we get a palindrome (4544334454).

The spelling of 1312212323 in words is "one billion, three hundred twelve million, two hundred twelve thousand, three hundred twenty-three".