12212201212220 has 12 divisors (see below), whose sum is σ = 25645622545704. Its totient is φ = 4884880484880.

The previous prime is 12212201212181. The next prime is 12212201212279. The reversal of 12212201212220 is 2221210221221.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 610610060611 = 12212201212220 / (1 + 2 + 2 + 1 + 2 + 2 + 0 + 1 + 2 + 1 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 12212201212192 and 12212201212201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305305030286 + ... + 305305030325.

It is an arithmetic number, because the mean of its divisors is an integer number (2137135212142).

Almost surely, 2^{12212201212220} is an apocalyptic number.

12212201212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212201212220 is an abundant number, since it is smaller than the sum of its proper divisors (13433421333484).

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

12212201212220 is a wasteful number, since it uses less digits than its factorization.

12212201212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610610060620 (or 610610060618 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12212201212220 its reverse (2221210221221), we get a palindrome (14433411433441).

Subtracting from 12212201212220 its reverse (2221210221221), we obtain a palindrome (9990990990999).

The spelling of 12212201212220 in words is "twelve trillion, two hundred twelve billion, two hundred one million, two hundred twelve thousand, two hundred twenty".