201220212110220 has 144 divisors (see below), whose sum is σ = 610741328590848. Its totient is φ = 53625909617280.

The previous prime is 201220212110209. The next prime is 201220212110221. The reversal of 201220212110220 is 22011212022102.

It is a happy number.

201220212110220 is a `hidden beast` number, since 2 + 0 + 1 + 220 + 212 + 1 + 10 + 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 = 201220212110193 and 201220212110202.

It is not an unprimeable number, because it can be changed into a prime (201220212110221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2498751597 + ... + 2498832123.

Almost surely, 2^{201220212110220} is an apocalyptic number.

201220212110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201220212110220 is an abundant number, since it is smaller than the sum of its proper divisors (409521116480628).

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

201220212110220 is a wasteful number, since it uses less digits than its factorization.

201220212110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88860 (or 88855 counting only the distinct ones).

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

Adding to 201220212110220 its reverse (22011212022102), we get a palindrome (223231424132322).

The spelling of 201220212110220 in words is "two hundred one trillion, two hundred twenty billion, two hundred twelve million, one hundred ten thousand, two hundred twenty".