2100120111966 has 16 divisors (see below), whose sum is σ = 4262930377344. Its totient is φ = 689591678424.

The previous prime is 2100120111959. The next prime is 2100120111967. The reversal of 2100120111966 is 6691110210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100120111967) 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, 2612089290 + ... + 2612090093.

It is an arithmetic number, because the mean of its divisors is an integer number (266433148584).

Almost surely, 2^{2100120111966} is an apocalyptic number.

2100120111966 is an abundant number, since it is smaller than the sum of its proper divisors (2162810265378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2100120111966 is a wasteful number, since it uses less digits than its factorization.

2100120111966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5224179455.

The product of its (nonzero) digits is 1296, while the sum is 30.

Adding to 2100120111966 its reverse (6691110210012), we get a palindrome (8791230321978).

The spelling of 2100120111966 in words is "two trillion, one hundred billion, one hundred twenty million, one hundred eleven thousand, nine hundred sixty-six".