20011101111011 has 4 divisors (see below), whose sum is σ = 20038401386112. Its totient is φ = 19983800835912.

The previous prime is 20011101111007. The next prime is 20011101111041. The reversal of 20011101111011 is 11011110111002.

It is a happy number.

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 20011101111011 - 2² = 20011101111007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011101110983 and 20011101111001.

It is not an unprimeable number, because it can be changed into a prime (20011101111041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13650136451 + ... + 13650137916.

It is an arithmetic number, because the mean of its divisors is an integer number (5009600346528).

Almost surely, 2^{20011101111011} is an apocalyptic number.

20011101111011 is a deficient number, since it is larger than the sum of its proper divisors (27300275101).

20011101111011 is an equidigital number, since it uses as much as digits as its factorization.

20011101111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27300275100.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 20011101111011 its reverse (11011110111002), we get a palindrome (31022211222013).

The spelling of 20011101111011 in words is "twenty trillion, eleven billion, one hundred one million, one hundred eleven thousand, eleven".