20002100211100 has 72 divisors (see below), whose sum is σ = 49633703913248. Its totient is φ = 6853923475200.

The previous prime is 20002100211083. The next prime is 20002100211103. The reversal of 20002100211100 is 111200120002.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002100211103) 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, 6987627 + ... + 9425026.

Almost surely, 2^{20002100211100} is an apocalyptic number.

20002100211100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002100211100 is an abundant number, since it is smaller than the sum of its proper divisors (29631603702148).

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

20002100211100 is a wasteful number, since it uses less digits than its factorization.

20002100211100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16414415 (or 16414408 counting only the distinct ones).

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

Adding to 20002100211100 its reverse (111200120002), we get a palindrome (20113300331102).

The spelling of 20002100211100 in words is "twenty trillion, two billion, one hundred million, two hundred eleven thousand, one hundred".