20011120101 has 12 divisors (see below), whose sum is σ = 33034230112. Its totient is φ = 11434925736.

The previous prime is 20011120091. The next prime is 20011120159. The reversal of 20011120101 is 10102111002.

It is a happy number.

It is not a de Polignac number, because 20011120101 - 2⁹ = 20011119589 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011120901) 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 11 ways as a sum of consecutive naturals, for example, 158818351 + ... + 158818476.

Almost surely, 2^20011120101 is an apocalyptic number.

20011120101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20011120101 is a deficient number, since it is larger than the sum of its proper divisors (13023110011).

20011120101 is a wasteful number, since it uses less digits than its factorization.

20011120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317636840 (or 317636837 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20011120101 its reverse (10102111002), we get a palindrome (30113231103).

Subtracting from 20011120101 its reverse (10102111002), we obtain a palindrome (9909009099).

The spelling of 20011120101 in words is "twenty billion, eleven million, one hundred twenty thousand, one hundred one".