1000211011997 has 2 divisors, whose sum is σ = 1000211011998. Its totient is φ = 1000211011996.

The previous prime is 1000211011991. The next prime is 1000211012039. The reversal of 1000211011997 is 7991101120001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993428830681 + 6782181316 = 996709^2 + 82354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000211011997 - 2⁸ = 1000211011741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000211011991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500105505998 + 500105505999.

It is an arithmetic number, because the mean of its divisors is an integer number (500105505999).

Almost surely, 2^{1000211011997} is an apocalyptic number.

It is an amenable number.

1000211011997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000211011997 is an equidigital number, since it uses as much as digits as its factorization.

1000211011997 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 32.

Adding to 1000211011997 its reverse (7991101120001), we get a palindrome (8991312131998).

The spelling of 1000211011997 in words is "one trillion, two hundred eleven million, eleven thousand, nine hundred ninety-seven".