12121030020120 has 128 divisors (see below), whose sum is σ = 41575916044800. Its totient is φ = 2769314558976.

The previous prime is 12121030020097. The next prime is 12121030020131. The reversal of 12121030020120 is 2102003012121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12121030020120.

It is a congruent number.

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, 1211530 + ... + 5070489.

It is an arithmetic number, because the mean of its divisors is an integer number (324811844100).

Almost surely, 2^{12121030020120} is an apocalyptic number.

12121030020120 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 12121030020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20787958022400).

12121030020120 is an abundant number, since it is smaller than the sum of its proper divisors (29454886024680).

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

12121030020120 is a wasteful number, since it uses less digits than its factorization.

12121030020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6284337 (or 6284333 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12121030020120 its reverse (2102003012121), we get a palindrome (14223033032241).

The spelling of 12121030020120 in words is "twelve trillion, one hundred twenty-one billion, thirty million, twenty thousand, one hundred twenty".