12213321021220 has 24 divisors (see below), whose sum is σ = 27979608158208. Its totient is φ = 4441207644000.

The previous prime is 12213321021211. The next prime is 12213321021227. The reversal of 12213321021220 is 2212012331221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 12213321021191 and 12213321021200.

It is not an unprimeable number, because it can be changed into a prime (12213321021227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27757547556 + ... + 27757547995.

It is an arithmetic number, because the mean of its divisors is an integer number (1165817006592).

Almost surely, 2^{12213321021220} is an apocalyptic number.

12213321021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12213321021220 is an abundant number, since it is smaller than the sum of its proper divisors (15766287136988).

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

12213321021220 is a wasteful number, since it uses less digits than its factorization.

12213321021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55515095571 (or 55515095569 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 12213321021220 its reverse (2212012331221), we get a palindrome (14425333352441).

The spelling of 12213321021220 in words is "twelve trillion, two hundred thirteen billion, three hundred twenty-one million, twenty-one thousand, two hundred twenty".