2100112112121 has 8 divisors (see below), whose sum is σ = 2800183360704. Its totient is φ = 1400057802480.

The previous prime is 2100112112029. The next prime is 2100112112167. The reversal of 2100112112121 is 1212112110012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2100112112121 - 2³⁵ = 2065752373753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2100112112121.

It is not an unprimeable number, because it can be changed into a prime (2100112112191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3942565 + ... + 4443426.

It is an arithmetic number, because the mean of its divisors is an integer number (350022920088).

Almost surely, 2^{2100112112121} is an apocalyptic number.

It is an amenable number.

2100112112121 is a deficient number, since it is larger than the sum of its proper divisors (700071248583).

2100112112121 is an equidigital number, since it uses as much as digits as its factorization.

2100112112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8469471.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2100112112121 its reverse (1212112110012), we get a palindrome (3312224222133).

The spelling of 2100112112121 in words is "two trillion, one hundred billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-one".