1002111001091 has 2 divisors, whose sum is σ = 1002111001092. Its totient is φ = 1002111001090.

The previous prime is 1002111001037. The next prime is 1002111001097. The reversal of 1002111001091 is 1901001112001.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1901001112001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1002111001091 - 2¹⁰ = 1002111000067 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1002111001097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501055500545 + 501055500546.

It is an arithmetic number, because the mean of its divisors is an integer number (501055500546).

Almost surely, 2^{1002111001091} is an apocalyptic number.

1002111001091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002111001091 is an equidigital number, since it uses as much as digits as its factorization.

1002111001091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 1002111001091 its reverse (1901001112001), we get a palindrome (2903112113092).

The spelling of 1002111001091 in words is "one trillion, two billion, one hundred eleven million, one thousand, ninety-one".