20011020110011 has 4 divisors (see below), whose sum is σ = 22869737268592. Its totient is φ = 17152302951432.

The previous prime is 20011020109991. The next prime is 20011020110069. The reversal of 20011020110011 is 11001102011002.

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 20011020110011 - 2⁹ = 20011020109499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20011020110011.

It is not an unprimeable number, because it can be changed into a prime (20011020111011) 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, 1429358579280 + ... + 1429358579293.

It is an arithmetic number, because the mean of its divisors is an integer number (5717434317148).

Almost surely, 2^{20011020110011} is an apocalyptic number.

20011020110011 is a deficient number, since it is larger than the sum of its proper divisors (2858717158581).

20011020110011 is an equidigital number, since it uses as much as digits as its factorization.

20011020110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858717158580.

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

Adding to 20011020110011 its reverse (11001102011002), we get a palindrome (31012122121013).

It can be divided in two parts, 2001102011001 and 1, that added together give a palindrome (2001102011002).

The spelling of 20011020110011 in words is "twenty trillion, eleven billion, twenty million, one hundred ten thousand, eleven".