12102222121220 has 192 divisors, whose sum is σ = 32843659161600. Its totient is φ = 3634800637440.

The previous prime is 12102222121219. The next prime is 12102222121243. The reversal of 12102222121220 is 2212122220121.

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 = 12102222121192 and 12102222121201.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22194611 + ... + 22733349.

It is an arithmetic number, because the mean of its divisors is an integer number (171060724800).

Almost surely, 2^{12102222121220} is an apocalyptic number.

12102222121220 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 12102222121220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16421829580800).

12102222121220 is an abundant number, since it is smaller than the sum of its proper divisors (20741437040380).

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

12102222121220 is a wasteful number, since it uses less digits than its factorization.

12102222121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539298 (or 539296 counting only the distinct ones).

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

Adding to 12102222121220 its reverse (2212122220121), we get a palindrome (14314344341341).

The spelling of 12102222121220 in words is "twelve trillion, one hundred two billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty".