1031321320903 has 2 divisors, whose sum is σ = 1031321320904. Its totient is φ = 1031321320902.

The previous prime is 1031321320811. The next prime is 1031321320921. The reversal of 1031321320903 is 3090231231301.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1031321320903 - 2²¹ = 1031319223751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031321330903) 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 as a sum of consecutive naturals, namely, 515660660451 + 515660660452.

It is an arithmetic number, because the mean of its divisors is an integer number (515660660452).

Almost surely, 2^{1031321320903} is an apocalyptic number.

1031321320903 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031321320903 is an equidigital number, since it uses as much as digits as its factorization.

1031321320903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 1031321320903 in words is "one trillion, thirty-one billion, three hundred twenty-one million, three hundred twenty thousand, nine hundred three".