12021230131220 has 12 divisors (see below), whose sum is σ = 25244583275604. Its totient is φ = 4808492052480.

The previous prime is 12021230131217. The next prime is 12021230131223. The reversal of 12021230131220 is 2213103212021.

12021230131220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12021230131217) and next prime (12021230131223).

It can be written as a sum of positive squares in 2 ways, for example, as 4334240989456 + 7686989141764 = 2081884^2 + 2772542^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 601061506561 = 12021230131220 / (1 + 2 + 0 + 2 + 1 + 2 + 3 + 0 + 1 + 3 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 12021230131192 and 12021230131201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021230131223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300530753261 + ... + 300530753300.

It is an arithmetic number, because the mean of its divisors is an integer number (2103715272967).

Almost surely, 2^{12021230131220} is an apocalyptic number.

12021230131220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021230131220 is an abundant number, since it is smaller than the sum of its proper divisors (13223353144384).

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

12021230131220 is a wasteful number, since it uses less digits than its factorization.

12021230131220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601061506570 (or 601061506568 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12021230131220 its reverse (2213103212021), we get a palindrome (14234333343241).

The spelling of 12021230131220 in words is "twelve trillion, twenty-one billion, two hundred thirty million, one hundred thirty-one thousand, two hundred twenty".