1312011211213 has 4 divisors (see below), whose sum is σ = 1312666236288. Its totient is φ = 1311356186140.

The previous prime is 1312011211151. The next prime is 1312011211283. The reversal of 1312011211213 is 3121121102131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312011211213 - 2⁹ = 1312011210701 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 (1312011211283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327509533 + ... + 327513538.

It is an arithmetic number, because the mean of its divisors is an integer number (328166559072).

Almost surely, 2^{1312011211213} is an apocalyptic number.

It is an amenable number.

1312011211213 is a deficient number, since it is larger than the sum of its proper divisors (655025075).

1312011211213 is an equidigital number, since it uses as much as digits as its factorization.

1312011211213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655025074.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1312011211213 its reverse (3121121102131), we get a palindrome (4433132313344).

The spelling of 1312011211213 in words is "one trillion, three hundred twelve billion, eleven million, two hundred eleven thousand, two hundred thirteen".