1003331121997 has 2 divisors, whose sum is σ = 1003331121998. Its totient is φ = 1003331121996.

The previous prime is 1003331121979. The next prime is 1003331122043. The reversal of 1003331121997 is 7991211333001.

Together with previous prime (1003331121979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 928883453796 + 74447668201 = 963786^2 + 272851^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003331121997 - 2¹¹ = 1003331119949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1003331121967) 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, 501665560998 + 501665560999.

It is an arithmetic number, because the mean of its divisors is an integer number (501665560999).

Almost surely, 2^{1003331121997} is an apocalyptic number.

It is an amenable number.

1003331121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1003331121997 is an equidigital number, since it uses as much as digits as its factorization.

1003331121997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 40.

Adding to 1003331121997 its reverse (7991211333001), we get a palindrome (8994542454998).

The spelling of 1003331121997 in words is "one trillion, three billion, three hundred thirty-one million, one hundred twenty-one thousand, nine hundred ninety-seven".