12021030001220 has 24 divisors (see below), whose sum is σ = 25374961782744. Its totient is φ = 4783497947136.

The previous prime is 12021030001219. The next prime is 12021030001231. The reversal of 12021030001220 is 2210003012021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1020451510276 + 11000578490944 = 1010174^2 + 3316712^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12021030001195 and 12021030001204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1557124379 + ... + 1557132098.

It is an arithmetic number, because the mean of its divisors is an integer number (1057290074281).

Almost surely, 2^{12021030001220} is an apocalyptic number.

12021030001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021030001220 is an abundant number, since it is smaller than the sum of its proper divisors (13353931781524).

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

12021030001220 is a wasteful number, since it uses less digits than its factorization.

12021030001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114256679 (or 3114256677 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12021030001220 its reverse (2210003012021), we get a palindrome (14231033013241).

The spelling of 12021030001220 in words is "twelve trillion, twenty-one billion, thirty million, one thousand, two hundred twenty".