20001100111011 has 16 divisors (see below), whose sum is σ = 29808692121600. Its totient is φ = 13254222026664.

The previous prime is 20001100111009. The next prime is 20001100111019. The reversal of 20001100111011 is 11011100110002.

It is not a de Polignac number, because 20001100111011 - 2¹ = 20001100111009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20001100110984 and 20001100111002.

It is not an unprimeable number, because it can be changed into a prime (20001100111019) 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, 2217904131 + ... + 2217913148.

It is an arithmetic number, because the mean of its divisors is an integer number (1863043257600).

Almost surely, 2^{20001100111011} is an apocalyptic number.

20001100111011 is a deficient number, since it is larger than the sum of its proper divisors (9807592010589).

20001100111011 is a wasteful number, since it uses less digits than its factorization.

20001100111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4435817455 (or 4435817449 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 20001100111011 its reverse (11011100110002), we get a palindrome (31012200221013).

The spelling of 20001100111011 in words is "twenty trillion, one billion, one hundred million, one hundred eleven thousand, eleven".