12212120111220 has 96 divisors (see below), whose sum is σ = 37995645542400. Its totient is φ = 3256361108352.

The previous prime is 12212120111173. The next prime is 12212120111227. The reversal of 12212120111220 is 2211102121221.

12212120111220 is a `hidden beast` number, since 1 + 2 + 212 + 120 + 111 + 220 = 666.

It is a super-2 number, since 2×12212120111220² (a number of 27 digits) contains 22 as substring.

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 = 12212120111193 and 12212120111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212120111227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8007426 + ... + 9409734.

It is an arithmetic number, because the mean of its divisors is an integer number (395787974400).

Almost surely, 2^{12212120111220} is an apocalyptic number.

12212120111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212120111220 is an abundant number, since it is smaller than the sum of its proper divisors (25783525431180).

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

12212120111220 is a wasteful number, since it uses less digits than its factorization.

12212120111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418454 (or 1418446 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12212120111220 its reverse (2211102121221), we get a palindrome (14423222232441).

The spelling of 12212120111220 in words is "twelve trillion, two hundred twelve billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty".