1331043231013 has 2 divisors, whose sum is σ = 1331043231014. Its totient is φ = 1331043231012.

The previous prime is 1331043230987. The next prime is 1331043231061. The reversal of 1331043231013 is 3101323401331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1154406271489 + 176636959524 = 1074433^2 + 420282^2 .

It is an emirp because it is prime and its reverse (3101323401331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331043231013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331043271013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665521615506 + 665521615507.

It is an arithmetic number, because the mean of its divisors is an integer number (665521615507).

Almost surely, 2^{1331043231013} is an apocalyptic number.

It is an amenable number.

1331043231013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331043231013 is an equidigital number, since it uses as much as digits as its factorization.

1331043231013 is an evil number, because the sum of its binary digits is even.

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

Adding to 1331043231013 its reverse (3101323401331), we get a palindrome (4432366632344).

The spelling of 1331043231013 in words is "one trillion, three hundred thirty-one billion, forty-three million, two hundred thirty-one thousand, thirteen".