1312011211333 has 4 divisors (see below), whose sum is σ = 1312213907628. Its totient is φ = 1311808515040.

The previous prime is 1312011211283. The next prime is 1312011211363. The reversal of 1312011211333 is 3331121102131.

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 644484628804 + 667526582529 = 802798^2 + 817023^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312011211333 - 2⁹ = 1312011210821 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 (1312011211363) 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, 101338438 + ... + 101351383.

It is an arithmetic number, because the mean of its divisors is an integer number (328053476907).

Almost surely, 2^{1312011211333} is an apocalyptic number.

It is an amenable number.

1312011211333 is a deficient number, since it is larger than the sum of its proper divisors (202696295).

1312011211333 is an equidigital number, since it uses as much as digits as its factorization.

1312011211333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202696294.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1312011211333 its reverse (3331121102131), we get a palindrome (4643132313464).

The spelling of 1312011211333 in words is "one trillion, three hundred twelve billion, eleven million, two hundred eleven thousand, three hundred thirty-three".