20120320112220 has 144 divisors (see below), whose sum is σ = 61641288989280. Its totient is φ = 5311832256000.

The previous prime is 20120320112183. The next prime is 20120320112231. The reversal of 20120320112220 is 2221102302102.

20120320112220 is a `hidden beast` number, since 2 + 0 + 12 + 0 + 320 + 112 + 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 = 20120320112193 and 20120320112202.

It is a congruent number.

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, 241588746 + ... + 241672014.

It is an arithmetic number, because the mean of its divisors is an integer number (428064506870).

Almost surely, 2^{20120320112220} is an apocalyptic number.

20120320112220 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 20120320112220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30820644494640).

20120320112220 is an abundant number, since it is smaller than the sum of its proper divisors (41520968877060).

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

20120320112220 is a wasteful number, since it uses less digits than its factorization.

20120320112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96676 (or 96671 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20120320112220 its reverse (2221102302102), we get a palindrome (22341422414322).

The spelling of 20120320112220 in words is "twenty trillion, one hundred twenty billion, three hundred twenty million, one hundred twelve thousand, two hundred twenty".