20112220012122 has 128 divisors (see below), whose sum is σ = 52168603852800. Its totient is φ = 5623744085568.

The previous prime is 20112220012121. The next prime is 20112220012127. The reversal of 20112220012122 is 22121002221102.

It is a happy number.

20112220012122 is a `hidden beast` number, since 201 + 122 + 200 + 121 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20112220012095 and 20112220012104.

It is not an unprimeable number, because it can be changed into a prime (20112220012121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 484156029 + ... + 484197567.

It is an arithmetic number, because the mean of its divisors is an integer number (407567217600).

Almost surely, 2^{20112220012122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112220012122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26084301926400).

20112220012122 is an abundant number, since it is smaller than the sum of its proper divisors (32056383840678).

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

20112220012122 is a wasteful number, since it uses less digits than its factorization.

20112220012122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68857 (or 68851 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20112220012122 its reverse (22121002221102), we get a palindrome (42233222233224).

The spelling of 20112220012122 in words is "twenty trillion, one hundred twelve billion, two hundred twenty million, twelve thousand, one hundred twenty-two".