12211021220220 has 144 divisors (see below), whose sum is σ = 39073792343040. Its totient is φ = 3078226343808.

The previous prime is 12211021220213. The next prime is 12211021220257. The reversal of 12211021220220 is 2202212011221.

It is a happy number.

12211021220220 is a `hidden beast` number, since 1 + 2 + 211 + 0 + 212 + 20 + 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 = 12211021220193 and 12211021220202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2272344 + ... + 5439263.

It is an arithmetic number, because the mean of its divisors is an integer number (271345780160).

Almost surely, 2^{12211021220220} is an apocalyptic number.

12211021220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211021220220 is an abundant number, since it is smaller than the sum of its proper divisors (26862771122820).

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

12211021220220 is a wasteful number, since it uses less digits than its factorization.

12211021220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712104 (or 7712099 counting only the distinct ones).

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

Adding to 12211021220220 its reverse (2202212011221), we get a palindrome (14413233231441).

The spelling of 12211021220220 in words is "twelve trillion, two hundred eleven billion, twenty-one million, two hundred twenty thousand, two hundred twenty".