1312212343 has 4 divisors (see below), whose sum is σ = 1413151768. Its totient is φ = 1211272920.

The previous prime is 1312212331. The next prime is 1312212347. The reversal of 1312212343 is 3432122131.

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

It is not a de Polignac number, because 1312212343 - 2⁵ = 1312212311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312212347) 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, 50469693 + ... + 50469718.

It is an arithmetic number, because the mean of its divisors is an integer number (353287942).

Almost surely, 2^1312212343 is an apocalyptic number.

1312212343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1312212343 is a deficient number, since it is larger than the sum of its proper divisors (100939425).

1312212343 is a wasteful number, since it uses less digits than its factorization.

1312212343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100939424.

The product of its digits is 864, while the sum is 22.

The square root of 1312212343 is about 36224.4716041518. The cubic root of 1312212343 is about 1094.7997918682.

Adding to 1312212343 its reverse (3432122131), we get a palindrome (4744334474).

The spelling of 1312212343 in words is "one billion, three hundred twelve million, two hundred twelve thousand, three hundred forty-three".