20001121101100 has 18 divisors (see below), whose sum is σ = 43402432789604. Its totient is φ = 8000448440400.

The previous prime is 20001121101089. The next prime is 20001121101107. The reversal of 20001121101100 is 110112110002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (20001121101107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100005605406 + ... + 100005605605.

Almost surely, 2^{20001121101100} is an apocalyptic number.

20001121101100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001121101100 is an abundant number, since it is smaller than the sum of its proper divisors (23401311688504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20001121101100 is a wasteful number, since it uses less digits than its factorization.

20001121101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200011211025 (or 200011211018 counting only the distinct ones).

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

Adding to 20001121101100 its reverse (110112110002), we get a palindrome (20111233211102).

The spelling of 20001121101100 in words is "twenty trillion, one billion, one hundred twenty-one million, one hundred one thousand, one hundred".