2100120312 has 32 divisors (see below), whose sum is σ = 5526633600. Its totient is φ = 663195744.

The previous prime is 2100120287. The next prime is 2100120329. The reversal of 2100120312 is 2130210012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2302308 + ... + 2303219.

It is an arithmetic number, because the mean of its divisors is an integer number (172707300).

Almost surely, 2^2100120312 is an apocalyptic number.

It is an amenable number.

2100120312 is an abundant number, since it is smaller than the sum of its proper divisors (3426513288).

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

2100120312 is a wasteful number, since it uses less digits than its factorization.

2100120312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605555 (or 4605551 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2100120312 is about 45827.0696422977. The cubic root of 2100120312 is about 1280.6036199237.

Adding to 2100120312 its reverse (2130210012), we get a palindrome (4230330324).

The spelling of 2100120312 in words is "two billion, one hundred million, one hundred twenty thousand, three hundred twelve".