1312105219 has 4 divisors (see below), whose sum is σ = 1369153296. Its totient is φ = 1255057144.

The previous prime is 1312105217. The next prime is 1312105229. The reversal of 1312105219 is 9125012131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9125012131 = 5197 ⋅1755823.

It is a cyclic number.

It is not a de Polignac number, because 1312105219 - 2¹ = 1312105217 is a prime.

It is a super-2 number, since 2×1312105219² = 3443240211454075922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312105193 and 1312105202.

It is not an unprimeable number, because it can be changed into a prime (1312105217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28524004 + ... + 28524049.

It is an arithmetic number, because the mean of its divisors is an integer number (342288324).

Almost surely, 2^1312105219 is an apocalyptic number.

1312105219 is a deficient number, since it is larger than the sum of its proper divisors (57048077).

1312105219 is an equidigital number, since it uses as much as digits as its factorization.

1312105219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57048076.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1312105219 is about 36222.9929602732. The cubic root of 1312105219 is about 1094.7699993007.

The spelling of 1312105219 in words is "one billion, three hundred twelve million, one hundred five thousand, two hundred nineteen".