12211221022220 has 48 divisors (see below), whose sum is σ = 29191092795648. Its totient is φ = 4247381223360.

The previous prime is 12211221022199. The next prime is 12211221022241. The reversal of 12211221022220 is 2222012211221.

12211221022220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12211221022199) and next prime (12211221022241).

It is a super-2 number, since 2×12211221022220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12211221022192 and 12211221022201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1206637334 + ... + 1206647453.

It is an arithmetic number, because the mean of its divisors is an integer number (608147766576).

Almost surely, 2^{12211221022220} is an apocalyptic number.

12211221022220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211221022220 is an abundant number, since it is smaller than the sum of its proper divisors (16979871773428).

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

12211221022220 is a wasteful number, since it uses less digits than its factorization.

12211221022220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413284830 (or 2413284828 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12211221022220 its reverse (2222012211221), we get a palindrome (14433233233441).

The spelling of 12211221022220 in words is "twelve trillion, two hundred eleven billion, two hundred twenty-one million, twenty-two thousand, two hundred twenty".