2111212102120 has 128 divisors (see below), whose sum is σ = 5307091073280. Its totient is φ = 749405440000.

The previous prime is 2111212101997. The next prime is 2111212102123. The reversal of 2111212102120 is 212012121112.

It is a junction number, because it is equal to n+sod(n) for n = 2111212102094 and 2111212102103.

It is not an unprimeable number, because it can be changed into a prime (2111212102123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2820684 + ... + 3489796.

It is an arithmetic number, because the mean of its divisors is an integer number (41461649010).

Almost surely, 2^{2111212102120} is an apocalyptic number.

2111212102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111212102120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2653545536640).

2111212102120 is an abundant number, since it is smaller than the sum of its proper divisors (3195878971160).

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

2111212102120 is a wasteful number, since it uses less digits than its factorization.

2111212102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669307 (or 669303 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2111212102120 its reverse (212012121112), we get a palindrome (2323224223232).

The spelling of 2111212102120 in words is "two trillion, one hundred eleven billion, two hundred twelve million, one hundred two thousand, one hundred twenty".