12211212222120 has 512 divisors, whose sum is σ = 38978176665600. Its totient is φ = 3056511283200.

The previous prime is 12211212222119. The next prime is 12211212222137. The reversal of 12211212222120 is 2122221211221.

It is a super-2 number, since 2×12211212222120² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12575913235 + ... + 12575914205.

It is an arithmetic number, because the mean of its divisors is an integer number (76129251300).

Almost surely, 2^{12211212222120} is an apocalyptic number.

12211212222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211212222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19489088332800).

12211212222120 is an abundant number, since it is smaller than the sum of its proper divisors (26766964443480).

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

12211212222120 is a wasteful number, since it uses less digits than its factorization.

12211212222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1925 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12211212222120 its reverse (2122221211221), we get a palindrome (14333433433341).

The spelling of 12211212222120 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty".