20112011222220 has 144 divisors (see below), whose sum is σ = 64615500986400. Its totient is φ = 5046122170368.

The previous prime is 20112011222197. The next prime is 20112011222273. The reversal of 20112011222220 is 2222211021102.

It is a happy number.

20112011222220 is a `hidden beast` number, since 20 + 1 + 1 + 201 + 1 + 222 + 220 = 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 = 20112011222193 and 20112011222202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8639806 + ... + 10717754.

It is an arithmetic number, because the mean of its divisors is an integer number (448718756850).

Almost surely, 2^{20112011222220} is an apocalyptic number.

20112011222220 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 20112011222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32307750493200).

20112011222220 is an abundant number, since it is smaller than the sum of its proper divisors (44503489764180).

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

20112011222220 is a wasteful number, since it uses less digits than its factorization.

20112011222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081144 (or 2081139 counting only the distinct ones).

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

Adding to 20112011222220 its reverse (2222211021102), we get a palindrome (22334222243322).

The spelling of 20112011222220 in words is "twenty trillion, one hundred twelve billion, eleven million, two hundred twenty-two thousand, two hundred twenty".