12121210210220 has 96 divisors (see below), whose sum is σ = 26708627727936. Its totient is φ = 4615575552000.

The previous prime is 12121210210217. The next prime is 12121210210279. The reversal of 12121210210220 is 2201201212121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34981820 + ... + 35326620.

It is an arithmetic number, because the mean of its divisors is an integer number (278214872166).

Almost surely, 2^{12121210210220} is an apocalyptic number.

12121210210220 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 12121210210220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13354313863968).

12121210210220 is an abundant number, since it is smaller than the sum of its proper divisors (14587417517716).

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

12121210210220 is a wasteful number, since it uses less digits than its factorization.

12121210210220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345891 (or 345889 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12121210210220 its reverse (2201201212121), we get a palindrome (14322411422341).

The spelling of 12121210210220 in words is "twelve trillion, one hundred twenty-one billion, two hundred ten million, two hundred ten thousand, two hundred twenty".