20002100112100 has 36 divisors (see below), whose sum is σ = 43405566515248. Its totient is φ = 8000654004000.

The previous prime is 20002100112083. The next prime is 20002100112107. The reversal of 20002100112100 is 121100120002.

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 (20002100112107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2037295 + ... + 6644905.

Almost surely, 2^{20002100112100} is an apocalyptic number.

20002100112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002100112100 is an abundant number, since it is smaller than the sum of its proper divisors (23403466403148).

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

20002100112100 is a wasteful number, since it uses less digits than its factorization.

20002100112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651036 (or 4651029 counting only the distinct ones).

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

Adding to 20002100112100 its reverse (121100120002), we get a palindrome (20123200232102).

The spelling of 20002100112100 in words is "twenty trillion, two billion, one hundred million, one hundred twelve thousand, one hundred".