12221210210220 has 72 divisors (see below), whose sum is σ = 40441095611280. Its totient is φ = 2962717626240.

The previous prime is 12221210210179. The next prime is 12221210210221. The reversal of 12221210210220 is 2201201212221.

It is a happy number.

12221210210220 is a `hidden beast` number, since 1 + 2 + 2 + 21 + 210 + 210 + 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 = 12221210210193 and 12221210210202.

It is not an unprimeable number, because it can be changed into a prime (12221210210221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3086162215 + ... + 3086166174.

It is an arithmetic number, because the mean of its divisors is an integer number (561681883490).

Almost surely, 2^{12221210210220} is an apocalyptic number.

12221210210220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221210210220 is an abundant number, since it is smaller than the sum of its proper divisors (28219885401060).

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

12221210210220 is a wasteful number, since it uses less digits than its factorization.

12221210210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6172328415 (or 6172328410 counting only the distinct ones).

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

Adding to 12221210210220 its reverse (2201201212221), we get a palindrome (14422411422441).

The spelling of 12221210210220 in words is "twelve trillion, two hundred twenty-one billion, two hundred ten million, two hundred ten thousand, two hundred twenty".