2100111210120 has 128 divisors (see below), whose sum is σ = 7854961443840. Its totient is φ = 436386743040.

The previous prime is 2100111210079. The next prime is 2100111210121. The reversal of 2100111210120 is 210121110012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 2100111210096 and 2100111210105.

It is not an unprimeable number, because it can be changed into a prime (2100111210121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113633142 + ... + 113651621.

It is an arithmetic number, because the mean of its divisors is an integer number (61366886280).

Almost surely, 2^{2100111210120} is an apocalyptic number.

2100111210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100111210120 is an abundant number, since it is smaller than the sum of its proper divisors (5754850233720).

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

2100111210120 is a wasteful number, since it uses less digits than its factorization.

2100111210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227284795 (or 227284791 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2100111210120 its reverse (210121110012), we get a palindrome (2310232320132).

The spelling of 2100111210120 in words is "two trillion, one hundred billion, one hundred eleven million, two hundred ten thousand, one hundred twenty".