12021110211220 has 96 divisors (see below), whose sum is σ = 27583221778560. Its totient is φ = 4364340963840.

The previous prime is 12021110211217. The next prime is 12021110211221. The reversal of 12021110211220 is 2211201112021.

It is a junction number, because it is equal to n+sod(n) for n = 12021110211194 and 12021110211203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021110211221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 483209422 + ... + 483234298.

It is an arithmetic number, because the mean of its divisors is an integer number (287325226860).

Almost surely, 2^{12021110211220} is an apocalyptic number.

12021110211220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021110211220 is an abundant number, since it is smaller than the sum of its proper divisors (15562111567340).

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

12021110211220 is a wasteful number, since it uses less digits than its factorization.

12021110211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28313 (or 28311 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12021110211220 its reverse (2211201112021), we get a palindrome (14232311323241).

The spelling of 12021110211220 in words is "twelve trillion, twenty-one billion, one hundred ten million, two hundred eleven thousand, two hundred twenty".