11212121000120 has 128 divisors (see below), whose sum is σ = 26119228723200. Its totient is φ = 4329033486336.

The previous prime is 11212121000107. The next prime is 11212121000141. The reversal of 11212121000120 is 2100012121211.

It is a junction number, because it is equal to n+sod(n) for n = 11212121000095 and 11212121000104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134666024 + ... + 134749256.

It is an arithmetic number, because the mean of its divisors is an integer number (204056474400).

Almost surely, 2^{11212121000120} is an apocalyptic number.

11212121000120 is a gapful number since it is divisible by the number (10) 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 11212121000120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13059614361600).

11212121000120 is an abundant number, since it is smaller than the sum of its proper divisors (14907107723080).

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

11212121000120 is a wasteful number, since it uses less digits than its factorization.

11212121000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84277 (or 84273 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11212121000120 its reverse (2100012121211), we get a palindrome (13312133121331).

The spelling of 11212121000120 in words is "eleven trillion, two hundred twelve billion, one hundred twenty-one million, one hundred twenty", and thus it is an aban number.