2101200112100 has 18 divisors (see below), whose sum is σ = 4559604243474. Its totient is φ = 840480044800.

The previous prime is 2101200112069. The next prime is 2101200112117. The reversal of 2101200112100 is 12110021012.

It can be written as a sum of positive squares in 3 ways, for example, as 536714481664 + 1564485630436 = 732608^2 + 1250794^2 .

It is a super-2 number, since 2×2101200112100² (a number of 25 digits) contains 22 as substring.

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, 10506000461 + ... + 10506000660.

Almost surely, 2^{2101200112100} is an apocalyptic number.

2101200112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101200112100 is an abundant number, since it is smaller than the sum of its proper divisors (2458404131374).

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

2101200112100 is a wasteful number, since it uses less digits than its factorization.

2101200112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21012001135 (or 21012001128 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 2101200112100 its reverse (12110021012), we get a palindrome (2113310133112).

The spelling of 2101200112100 in words is "two trillion, one hundred one billion, two hundred million, one hundred twelve thousand, one hundred".