20011101121 has 24 divisors (see below), whose sum is σ = 22741816832. Its totient is φ = 17576697600.

The previous prime is 20011101113. The next prime is 20011101163. The reversal of 20011101121 is 12110111002.

It is not a de Polignac number, because 20011101121 - 2³ = 20011101113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20011101098 and 20011101107.

It is not an unprimeable number, because it can be changed into a prime (20011191121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2520460 + ... + 2528386.

Almost surely, 2^20011101121 is an apocalyptic number.

It is an amenable number.

20011101121 is a deficient number, since it is larger than the sum of its proper divisors (2730715711).

20011101121 is a wasteful number, since it uses less digits than its factorization.

20011101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8653 (or 8642 counting only the distinct ones).

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

Adding to 20011101121 its reverse (12110111002), we get a palindrome (32121212123).

The spelling of 20011101121 in words is "twenty billion, eleven million, one hundred one thousand, one hundred twenty-one".