990111001001011 has 2 divisors, whose sum is σ = 990111001001012. Its totient is φ = 990111001001010.

The previous prime is 990111001000951. The next prime is 990111001001039. The reversal of 990111001001011 is 110100100111099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990111001001011 - 2¹¹ = 990111000998963 is a prime.

It is not a weakly prime, because it can be changed into another prime (990111001001611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495055500500505 + 495055500500506.

It is an arithmetic number, because the mean of its divisors is an integer number (495055500500506).

Almost surely, 2^{990111001001011} is an apocalyptic number.

990111001001011 is a deficient number, since it is larger than the sum of its proper divisors (1).

990111001001011 is an equidigital number, since it uses as much as digits as its factorization.

990111001001011 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 990111001001011 in words is "nine hundred ninety trillion, one hundred eleven billion, one million, one thousand, eleven".