12220121021220 has 120 divisors (see below), whose sum is σ = 43811396887104. Its totient is φ = 2793170516544.

The previous prime is 12220121021209. The next prime is 12220121021231. The reversal of 12220121021220 is 2212012102221.

It is a happy number.

12220121021220 is a `hidden beast` number, since 1 + 2 + 220 + 1 + 210 + 212 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (12220121021209) and next prime (12220121021231).

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 = 12220121021193 and 12220121021202.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 538794702 + ... + 538817381.

Almost surely, 2^{12220121021220} is an apocalyptic number.

12220121021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12220121021220 is an abundant number, since it is smaller than the sum of its proper divisors (31591275865884).

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

12220121021220 is a wasteful number, since it uses less digits than its factorization.

12220121021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1077612111 (or 1077612100 counting only the distinct ones).

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

Adding to 12220121021220 its reverse (2212012102221), we get a palindrome (14432133123441).

The spelling of 12220121021220 in words is "twelve trillion, two hundred twenty billion, one hundred twenty-one million, twenty-one thousand, two hundred twenty".