12021100012020 has 96 divisors (see below), whose sum is σ = 36719839175040. Its totient is φ = 2914139176960.

The previous prime is 12021100012007. The next prime is 12021100012021. The reversal of 12021100012020 is 2021000112021.

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 = 12021100011987 and 12021100012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021100012021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32425624 + ... + 32794256.

It is an arithmetic number, because the mean of its divisors is an integer number (382498324740).

Almost surely, 2^{12021100012020} is an apocalyptic number.

12021100012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021100012020 is an abundant number, since it is smaller than the sum of its proper divisors (24698739163020).

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

12021100012020 is a wasteful number, since it uses less digits than its factorization.

12021100012020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418065 (or 418063 counting only the distinct ones).

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

Adding to 12021100012020 its reverse (2021000112021), we get a palindrome (14042100124041).

It can be divided in two parts, 1202110001 and 2020, that added together give a palindrome (1202112021).

The spelling of 12021100012020 in words is "twelve trillion, twenty-one billion, one hundred million, twelve thousand, twenty".