9001111121111 has 2 divisors, whose sum is σ = 9001111121112. Its totient is φ = 9001111121110.

The previous prime is 9001111121087. The next prime is 9001111121131. The reversal of 9001111121111 is 1111211111009.

It is a happy number.

It is an a-pointer prime, because the next prime (9001111121131) can be obtained adding 9001111121111 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9001111121111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9001111121131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4500555560555 + 4500555560556.

It is an arithmetic number, because the mean of its divisors is an integer number (4500555560556).

Almost surely, 2^{9001111121111} is an apocalyptic number.

9001111121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

9001111121111 is an equidigital number, since it uses as much as digits as its factorization.

9001111121111 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 20.

The spelling of 9001111121111 in words is "nine trillion, one billion, one hundred eleven million, one hundred twenty-one thousand, one hundred eleven".