1011009999991 has 2 divisors, whose sum is σ = 1011009999992. Its totient is φ = 1011009999990.

The previous prime is 1011009999917. The next prime is 1011010000001. The reversal of 1011009999991 is 1999999001101.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011009999991 - 2⁷ = 1011009999863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012009999991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505504999995 + 505504999996.

It is an arithmetic number, because the mean of its divisors is an integer number (505504999996).

Almost surely, 2^{1011009999991} is an apocalyptic number.

1011009999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011009999991 is an equidigital number, since it uses as much as digits as its factorization.

1011009999991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 531441, while the sum is 58.

The spelling of 1011009999991 in words is "one trillion, eleven billion, nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".