12221212010220 has 96 divisors (see below), whose sum is σ = 38490950447040. Its totient is φ = 3258989857728.

The previous prime is 12221212010153. The next prime is 12221212010243. The reversal of 12221212010220 is 2201021212221.

It is a happy number.

12221212010220 is a `hidden beast` number, since 1 + 2 + 221 + 21 + 201 + 0 + 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 = 12221212010193 and 12221212010202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 139659187 + ... + 139746666.

It is an arithmetic number, because the mean of its divisors is an integer number (400947400490).

Almost surely, 2^{12221212010220} is an apocalyptic number.

12221212010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12221212010220 is an abundant number, since it is smaller than the sum of its proper divisors (26269738436820).

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

12221212010220 is an equidigital number, since it uses as much as digits as its factorization.

12221212010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279405883 (or 279405863 counting only the distinct ones).

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

Adding to 12221212010220 its reverse (2201021212221), we get a palindrome (14422233222441).

The spelling of 12221212010220 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, ten thousand, two hundred twenty".