1331212122313 has 4 divisors (see below), whose sum is σ = 1331429895828. Its totient is φ = 1330994348800.

The previous prime is 1331212122299. The next prime is 1331212122403. The reversal of 1331212122313 is 3132212121331.

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 252715333264 + 1078496789049 = 502708^2 + 1038507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331212122313 - 2²¹ = 1331210025161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331212122013) 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, 108877588 + ... + 108889813.

It is an arithmetic number, because the mean of its divisors is an integer number (332857473957).

Almost surely, 2^{1331212122313} is an apocalyptic number.

It is an amenable number.

1331212122313 is a deficient number, since it is larger than the sum of its proper divisors (217773515).

1331212122313 is an equidigital number, since it uses as much as digits as its factorization.

1331212122313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217773514.

The product of its digits is 1296, while the sum is 25.

Adding to 1331212122313 its reverse (3132212121331), we get a palindrome (4463424243644).

The spelling of 1331212122313 in words is "one trillion, three hundred thirty-one billion, two hundred twelve million, one hundred twenty-two thousand, three hundred thirteen".