20002120011100 has 18 divisors (see below), whose sum is σ = 43404600424304. Its totient is φ = 8000848004400.

The previous prime is 20002120011077. The next prime is 20002120011131. The reversal of 20002120011100 is 111002120002.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100010599956 + ... + 100010600155.

Almost surely, 2^{20002120011100} is an apocalyptic number.

20002120011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002120011100 is an abundant number, since it is smaller than the sum of its proper divisors (23402480413204).

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

20002120011100 is a wasteful number, since it uses less digits than its factorization.

20002120011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200021200125 (or 200021200118 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20002120011100 its reverse (111002120002), we get a palindrome (20113122131102).

The spelling of 20002120011100 in words is "twenty trillion, two billion, one hundred twenty million, eleven thousand, one hundred".