12030321121020 has 72 divisors (see below), whose sum is σ = 36675350930400. Its totient is φ = 3191964589440.

The previous prime is 12030321121009. The next prime is 12030321121033. The reversal of 12030321121020 is 2012112303021.

12030321121020 is a `hidden beast` number, since 1 + 203 + 0 + 321 + 121 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12030321120984 and 12030321121002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167891611 + ... + 167963250.

Almost surely, 2^{12030321121020} is an apocalyptic number.

12030321121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12030321121020 is an abundant number, since it is smaller than the sum of its proper divisors (24645029809380).

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

12030321121020 is a wasteful number, since it uses less digits than its factorization.

12030321121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335855075 (or 335855070 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 12030321121020 its reverse (2012112303021), we get a palindrome (14042433424041).

The spelling of 12030321121020 in words is "twelve trillion, thirty billion, three hundred twenty-one million, one hundred twenty-one thousand, twenty".