9901001111011 has 2 divisors, whose sum is σ = 9901001111012. Its totient is φ = 9901001111010.

The previous prime is 9901001111009. The next prime is 9901001111033. The reversal of 9901001111011 is 1101111001099.

It is a weak prime.

It is an emirp because it is prime and its reverse (1101111001099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9901001111011 - 2¹ = 9901001111009 is a prime.

Together with 9901001111009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9901001111611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4950500555505 + 4950500555506.

It is an arithmetic number, because the mean of its divisors is an integer number (4950500555506).

Almost surely, 2^{9901001111011} is an apocalyptic number.

9901001111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

9901001111011 is an equidigital number, since it uses as much as digits as its factorization.

9901001111011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 9901001111011 in words is "nine trillion, nine hundred one billion, one million, one hundred eleven thousand, eleven".