20111001002011 has 4 divisors (see below), whose sum is σ = 20111463995224. Its totient is φ = 20110538008800.

The previous prime is 20111001001943. The next prime is 20111001002033. The reversal of 20111001002011 is 11020010011102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20111001002011 - 2¹⁹ = 20111000477723 is a prime.

It is a super-2 number, since 2×20111001002011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26111001002011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231431445 + ... + 231518326.

It is an arithmetic number, because the mean of its divisors is an integer number (5027865998806).

Almost surely, 2^{20111001002011} is an apocalyptic number.

20111001002011 is a deficient number, since it is larger than the sum of its proper divisors (462993213).

20111001002011 is an equidigital number, since it uses as much as digits as its factorization.

20111001002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462993212.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20111001002011 its reverse (11020010011102), we get a palindrome (31131011013113).

Subtracting from 20111001002011 its reverse (11020010011102), we obtain a palindrome (9090990990909).

The spelling of 20111001002011 in words is "twenty trillion, one hundred eleven billion, one million, two thousand, eleven".