20001101111021 has 8 divisors (see below), whose sum is σ = 21350322907200. Its totient is φ = 18681532541280.

The previous prime is 20001101110919. The next prime is 20001101111027. The reversal of 20001101111021 is 12011110110002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20001101111021 - 2³⁰ = 20000027369197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20001101110993 and 20001101111011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001101111027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7413305216 + ... + 7413307913.

It is an arithmetic number, because the mean of its divisors is an integer number (2668790363400).

Almost surely, 2^{20001101111021} is an apocalyptic number.

It is an amenable number.

20001101111021 is a deficient number, since it is larger than the sum of its proper divisors (1349221796179).

20001101111021 is a wasteful number, since it uses less digits than its factorization.

20001101111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14826613219.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20001101111021 its reverse (12011110110002), we get a palindrome (32012211221023).

The spelling of 20001101111021 in words is "twenty trillion, one billion, one hundred one million, one hundred eleven thousand, twenty-one".