20111111101011 has 16 divisors (see below), whose sum is σ = 30716277476864. Its totient is φ = 11465522918784.

The previous prime is 20111111100961. The next prime is 20111111101013. The reversal of 20111111101011 is 11010111111102.

It is not a de Polignac number, because 20111111101011 - 2¹⁴ = 20111111084627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111111101013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1105847671 + ... + 1105865856.

It is an arithmetic number, because the mean of its divisors is an integer number (1919767342304).

Almost surely, 2^{20111111101011} is an apocalyptic number.

20111111101011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20111111101011 is a deficient number, since it is larger than the sum of its proper divisors (10605166375853).

20111111101011 is a wasteful number, since it uses less digits than its factorization.

20111111101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2211713970.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 20111111101011 its reverse (11010111111102), we get a palindrome (31121222212113).

The spelling of 20111111101011 in words is "twenty trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, eleven".