20001011101 has 4 divisors (see below), whose sum is σ = 20009758912. Its totient is φ = 19992263292.

The previous prime is 20001011089. The next prime is 20001011141. The reversal of 20001011101 is 10111010002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001011101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001011141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4370475 + ... + 4375048.

It is an arithmetic number, because the mean of its divisors is an integer number (5002439728).

Almost surely, 2^20001011101 is an apocalyptic number.

It is an amenable number.

20001011101 is a deficient number, since it is larger than the sum of its proper divisors (8747811).

20001011101 is an equidigital number, since it uses as much as digits as its factorization.

20001011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8747810.

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

Adding to 20001011101 its reverse (10111010002), we get a palindrome (30112021103).

It can be divided in two parts, 2000 and 1011101, that added together give a palindrome (1013101).

The spelling of 20001011101 in words is "twenty billion, one million, eleven thousand, one hundred one".