2011011001999 has 2 divisors, whose sum is σ = 2011011002000. Its totient is φ = 2011011001998.

The previous prime is 2011011001997. The next prime is 2011011002009. The reversal of 2011011001999 is 9991001101102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2011011001999 - 2¹ = 2011011001997 is a prime.

It is a super-2 number, since 2×2011011001999² (a number of 25 digits) contains 22 as substring.

Together with 2011011001997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011011001997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005505500999 + 1005505501000.

It is an arithmetic number, because the mean of its divisors is an integer number (1005505501000).

Almost surely, 2^{2011011001999} is an apocalyptic number.

2011011001999 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011011001999 is an equidigital number, since it uses as much as digits as its factorization.

2011011001999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 2011011001999 in words is "two trillion, eleven billion, eleven million, one thousand, nine hundred ninety-nine".