1001220111097 has 2 divisors, whose sum is σ = 1001220111098. Its totient is φ = 1001220111096.

The previous prime is 1001220111029. The next prime is 1001220111103. The reversal of 1001220111097 is 7901110221001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816368267961 + 184851843136 = 903531^2 + 429944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001220111097 - 2²⁷ = 1001085893369 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001220111007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500610055548 + 500610055549.

It is an arithmetic number, because the mean of its divisors is an integer number (500610055549).

Almost surely, 2^{1001220111097} is an apocalyptic number.

It is an amenable number.

1001220111097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001220111097 is an equidigital number, since it uses as much as digits as its factorization.

1001220111097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 25.

Adding to 1001220111097 its reverse (7901110221001), we get a palindrome (8902330332098).

The spelling of 1001220111097 in words is "one trillion, one billion, two hundred twenty million, one hundred eleven thousand, ninety-seven".