2120111102111 has 4 divisors (see below), whose sum is σ = 2125030153824. Its totient is φ = 2115192050400.

The previous prime is 2120111102033. The next prime is 2120111102117. The reversal of 2120111102111 is 1112011110212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120111102111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120111102117) 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, 2459525210 + ... + 2459526071.

It is an arithmetic number, because the mean of its divisors is an integer number (531257538456).

Almost surely, 2^{2120111102111} is an apocalyptic number.

2120111102111 is a deficient number, since it is larger than the sum of its proper divisors (4919051713).

2120111102111 is an equidigital number, since it uses as much as digits as its factorization.

2120111102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919051712.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2120111102111 its reverse (1112011110212), we get a palindrome (3232122212323).

It can be divided in two parts, 212011110211 and 1, that added together give a palindrome (212011110212).

The spelling of 2120111102111 in words is "two trillion, one hundred twenty billion, one hundred eleven million, one hundred two thousand, one hundred eleven".