2101200212101 has 4 divisors (see below), whose sum is σ = 2152448997804. Its totient is φ = 2049951426400.

The previous prime is 2101200212099. The next prime is 2101200212119. The reversal of 2101200212101 is 1012120021012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 182116416001 + 1919083796100 = 426751^2 + 1385310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101200212101 - 2¹ = 2101200212099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101200212161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25624392790 + ... + 25624392871.

It is an arithmetic number, because the mean of its divisors is an integer number (538112249451).

Almost surely, 2^{2101200212101} is an apocalyptic number.

It is an amenable number.

2101200212101 is a deficient number, since it is larger than the sum of its proper divisors (51248785703).

2101200212101 is an equidigital number, since it uses as much as digits as its factorization.

2101200212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51248785702.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2101200212101 its reverse (1012120021012), we get a palindrome (3113320233113).

The spelling of 2101200212101 in words is "two trillion, one hundred one billion, two hundred million, two hundred twelve thousand, one hundred one".