2121220122112 has 160 divisors (see below), whose sum is σ = 5384639361024. Its totient is φ = 812093644800.

The previous prime is 2121220122107. The next prime is 2121220122149. The reversal of 2121220122112 is 2112210221212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121220122112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710037 + ... + 2178667.

Almost surely, 2^{2121220122112} 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 2121220122112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2692319680512).

2121220122112 is an abundant number, since it is smaller than the sum of its proper divisors (3263419238912).

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

2121220122112 is a wasteful number, since it uses less digits than its factorization.

2121220122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468700 (or 1468684 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2121220122112 its reverse (2112210221212), we get a palindrome (4233430343324).

The spelling of 2121220122112 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twelve".