1312213303213 has 4 divisors (see below), whose sum is σ = 1317943492540. Its totient is φ = 1306483113888.

The previous prime is 1312213303189. The next prime is 1312213303231. The reversal of 1312213303213 is 3123033122131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 549321110244 + 762892192969 = 741162^2 + 873437^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312213303213 - 2²⁹ = 1311676432301 is a prime.

It is a super-2 number, since 2×1312213303213² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312213303243) 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, 2865094320 + ... + 2865094777.

It is an arithmetic number, because the mean of its divisors is an integer number (329485873135).

Almost surely, 2^{1312213303213} is an apocalyptic number.

It is an amenable number.

1312213303213 is a deficient number, since it is larger than the sum of its proper divisors (5730189327).

1312213303213 is an equidigital number, since it uses as much as digits as its factorization.

1312213303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5730189326.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1312213303213 its reverse (3123033122131), we get a palindrome (4435246425344).

The spelling of 1312213303213 in words is "one trillion, three hundred twelve billion, two hundred thirteen million, three hundred three thousand, two hundred thirteen".