11001001021999 has 2 divisors, whose sum is σ = 11001001022000. Its totient is φ = 11001001021998.

The previous prime is 11001001021961. The next prime is 11001001022093. The reversal of 11001001021999 is 99912010010011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11001001021999 - 2⁴¹ = 8801977766447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11001001021909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500500510999 + 5500500511000.

It is an arithmetic number, because the mean of its divisors is an integer number (5500500511000).

Almost surely, 2^{11001001021999} is an apocalyptic number.

11001001021999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11001001021999 is an equidigital number, since it uses as much as digits as its factorization.

11001001021999 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 11001001021999 in words is "eleven trillion, one billion, one million, twenty-one thousand, nine hundred ninety-nine".