20001101011 has 4 divisors (see below), whose sum is σ = 20003405272. Its totient is φ = 19998796752.

The previous prime is 20001101009. The next prime is 20001101039. The reversal of 20001101011 is 11010110002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11010110002 = 2 ⋅5505055001.

It is a cyclic number.

It is not a de Polignac number, because 20001101011 - 2¹ = 20001101009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001100985 and 20001101003.

It is not an unprimeable number, because it can be changed into a prime (20001101311) 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, 1139061 + ... + 1156486.

It is an arithmetic number, because the mean of its divisors is an integer number (5000851318).

Almost surely, 2^20001101011 is an apocalyptic number.

20001101011 is a deficient number, since it is larger than the sum of its proper divisors (2304261).

20001101011 is an equidigital number, since it uses as much as digits as its factorization.

20001101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2304260.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 20001101011 its reverse (11010110002), we get a palindrome (31011211013).

It can be divided in two parts, 2000 and 1101011, that added together give a palindrome (1103011).

The spelling of 20001101011 in words is "twenty billion, one million, one hundred one thousand, eleven".