1312212103 has 4 divisors (see below), whose sum is σ = 1320262648. Its totient is φ = 1304161560.

The previous prime is 1312212091. The next prime is 1312212119. The reversal of 1312212103 is 3012122131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3012122131 = 73 ⋅41261947.

It is a cyclic number.

It is not a de Polignac number, because 1312212103 - 2⁵ = 1312212071 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 (1312212703) 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, 4025028 + ... + 4025353.

It is an arithmetic number, because the mean of its divisors is an integer number (330065662).

Almost surely, 2^1312212103 is an apocalyptic number.

1312212103 is a deficient number, since it is larger than the sum of its proper divisors (8050545).

1312212103 is an equidigital number, since it uses as much as digits as its factorization.

1312212103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050544.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1312212103 is about 36224.4682914739. The cubic root of 1312212103 is about 1094.7997251229.

Adding to 1312212103 its reverse (3012122131), we get a palindrome (4324334234).

The spelling of 1312212103 in words is "one billion, three hundred twelve million, two hundred twelve thousand, one hundred three".