2120212121112 has 128 divisors (see below), whose sum is σ = 5936078016000. Its totient is φ = 701148389760.

The previous prime is 2120212121081. The next prime is 2120212121191. The reversal of 2120212121112 is 2111212120212.

It is a super-2 number, since 2×2120212121112² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 131936214 + ... + 131952282.

It is an arithmetic number, because the mean of its divisors is an integer number (46375609500).

Almost surely, 2^{2120212121112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2120212121112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2968039008000).

2120212121112 is an abundant number, since it is smaller than the sum of its proper divisors (3815865894888).

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

2120212121112 is a wasteful number, since it uses less digits than its factorization.

2120212121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20878 (or 20868 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2120212121112 its reverse (2111212120212), we get a palindrome (4231424241324).

The spelling of 2120212121112 in words is "two trillion, one hundred twenty billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twelve".