1031203321013 has 2 divisors, whose sum is σ = 1031203321014. Its totient is φ = 1031203321012.

The previous prime is 1031203321009. The next prime is 1031203321039. The reversal of 1031203321013 is 3101233021301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665345281969 + 365858039044 = 815687^2 + 604862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031203321013 - 2² = 1031203321009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031203321063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515601660506 + 515601660507.

It is an arithmetic number, because the mean of its divisors is an integer number (515601660507).

Almost surely, 2^{1031203321013} is an apocalyptic number.

It is an amenable number.

1031203321013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031203321013 is an equidigital number, since it uses as much as digits as its factorization.

1031203321013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1031203321013 its reverse (3101233021301), we get a palindrome (4132436342314).

The spelling of 1031203321013 in words is "one trillion, thirty-one billion, two hundred three million, three hundred twenty-one thousand, thirteen".