2100120111211 has 4 divisors (see below), whose sum is σ = 2100140802424. Its totient is φ = 2100099420000.

The previous prime is 2100120111191. The next prime is 2100120111223. The reversal of 2100120111211 is 1121110210012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2100120111211 - 2⁷ = 2100120111083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2100120111191 and 2100120111200.

It is not an unprimeable number, because it can be changed into a prime (2100120111251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10192605 + ... + 10396606.

It is an arithmetic number, because the mean of its divisors is an integer number (525035200606).

Almost surely, 2^{2100120111211} is an apocalyptic number.

2100120111211 is a deficient number, since it is larger than the sum of its proper divisors (20691213).

2100120111211 is a wasteful number, since it uses less digits than its factorization.

2100120111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20691212.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2100120111211 its reverse (1121110210012), we get a palindrome (3221230321223).

The spelling of 2100120111211 in words is "two trillion, one hundred billion, one hundred twenty million, one hundred eleven thousand, two hundred eleven".