2101112120209 has 4 divisors (see below), whose sum is σ = 2149975192816. Its totient is φ = 2052249047604.

The previous prime is 2101112120201. The next prime is 2101112120243. The reversal of 2101112120209 is 9020212111012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2101112120209 - 2³ = 2101112120201 is a prime.

It is a super-3 number, since 3×2101112120209³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2101112120209.

It is not an unprimeable number, because it can be changed into a prime (2101112120201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24431536239 + ... + 24431536324.

It is an arithmetic number, because the mean of its divisors is an integer number (537493798204).

Almost surely, 2^{2101112120209} is an apocalyptic number.

It is an amenable number.

2101112120209 is a deficient number, since it is larger than the sum of its proper divisors (48863072607).

2101112120209 is an equidigital number, since it uses as much as digits as its factorization.

2101112120209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48863072606.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 2101112120209 in words is "two trillion, one hundred one billion, one hundred twelve million, one hundred twenty thousand, two hundred nine".