12021001201020 has 48 divisors (see below), whose sum is σ = 38467203844608. Its totient is φ = 2747657417280.

The previous prime is 12021001201007. The next prime is 12021001201037. The reversal of 12021001201020 is 2010210012021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 12021001200987 and 12021001201005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14310715296 + ... + 14310716135.

It is an arithmetic number, because the mean of its divisors is an integer number (801400080096).

Almost surely, 2^{12021001201020} is an apocalyptic number.

12021001201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021001201020 is an abundant number, since it is smaller than the sum of its proper divisors (26446202643588).

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

12021001201020 is a wasteful number, since it uses less digits than its factorization.

12021001201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28621431450 (or 28621431448 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12021001201020 its reverse (2010210012021), we get a palindrome (14031211213041).

The spelling of 12021001201020 in words is "twelve trillion, twenty-one billion, one million, two hundred one thousand, twenty".