12212020121220 has 72 divisors (see below), whose sum is σ = 37512028095360. Its totient is φ = 3215316686400.

The previous prime is 12212020121201. The next prime is 12212020121239. The reversal of 12212020121220 is 2212102021221.

It is a happy number.

12212020121220 is a `hidden beast` number, since 1 + 221 + 2 + 0 + 201 + 21 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (12212020121201) and next prime (12212020121239).

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 = 12212020121193 and 12212020121202.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 429381706 + ... + 429410145.

Almost surely, 2^{12212020121220} is an apocalyptic number.

12212020121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212020121220 is an abundant number, since it is smaller than the sum of its proper divisors (25300007974140).

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

12212020121220 is a wasteful number, since it uses less digits than its factorization.

12212020121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858791945 (or 858791940 counting only the distinct ones).

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

Adding to 12212020121220 its reverse (2212102021221), we get a palindrome (14424122142441).

The spelling of 12212020121220 in words is "twelve trillion, two hundred twelve billion, twenty million, one hundred twenty-one thousand, two hundred twenty".