1001120001997 has 2 divisors, whose sum is σ = 1001120001998. Its totient is φ = 1001120001996.

The previous prime is 1001120001929. The next prime is 1001120002019. The reversal of 1001120001997 is 7991000211001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548694266121 + 452425735876 = 740739^2 + 672626^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001120001997 - 2¹⁵ = 1001119969229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001120001397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500560000998 + 500560000999.

It is an arithmetic number, because the mean of its divisors is an integer number (500560000999).

Almost surely, 2^{1001120001997} is an apocalyptic number.

It is an amenable number.

1001120001997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001120001997 is an equidigital number, since it uses as much as digits as its factorization.

1001120001997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 31.

Adding to 1001120001997 its reverse (7991000211001), we get a palindrome (8992120212998).

The spelling of 1001120001997 in words is "one trillion, one billion, one hundred twenty million, one thousand, nine hundred ninety-seven".