20122201202220 has 288 divisors, whose sum is σ = 68769617559552. Its totient is φ = 4725427474944.

The previous prime is 20122201202179. The next prime is 20122201202221. The reversal of 20122201202220 is 2220210222102.

20122201202220 is a `hidden beast` number, since 20 + 1 + 2 + 220 + 1 + 202 + 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 = 20122201202193 and 20122201202202.

It is not an unprimeable number, because it can be changed into a prime (20122201202221) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20124967 + ... + 21101153.

It is an arithmetic number, because the mean of its divisors is an integer number (238783394304).

Almost surely, 2^{20122201202220} is an apocalyptic number.

20122201202220 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 20122201202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34384808779776).

20122201202220 is an abundant number, since it is smaller than the sum of its proper divisors (48647416357332).

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

20122201202220 is a wasteful number, since it uses less digits than its factorization.

20122201202220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976621 (or 976616 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 20122201202220 its reverse (2220210222102), we get a palindrome (22342411424322).

The spelling of 20122201202220 in words is "twenty trillion, one hundred twenty-two billion, two hundred one million, two hundred two thousand, two hundred twenty".