12211021222220 has 48 divisors (see below), whose sum is σ = 25897723439616. Its totient is φ = 4835919840000.

The previous prime is 12211021222157. The next prime is 12211021222241. The reversal of 12211021222220 is 2222212011221.

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 = 12211021222192 and 12211021222201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122808725 + ... + 122908115.

It is an arithmetic number, because the mean of its divisors is an integer number (539535904992).

Almost surely, 2^{12211021222220} is an apocalyptic number.

12211021222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211021222220 is an abundant number, since it is smaller than the sum of its proper divisors (13686702217396).

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

12211021222220 is a wasteful number, since it uses less digits than its factorization.

12211021222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160322 (or 160320 counting only the distinct ones).

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

Adding to 12211021222220 its reverse (2222212011221), we get a palindrome (14433233233441).

The spelling of 12211021222220 in words is "twelve trillion, two hundred eleven billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty".