12012021002020 has 24 divisors (see below), whose sum is σ = 27165647497464. Its totient is φ = 4435207754496.

The previous prime is 12012021001993. The next prime is 12012021002029. The reversal of 12012021002020 is 2020012021021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 366782851876 + 11645238150144 = 605626^2 + 3412512^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (12012021002029) by changing a digit.

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, 23100040129 + ... + 23100040648.

It is an arithmetic number, because the mean of its divisors is an integer number (1131901979061).

Almost surely, 2^{12012021002020} is an apocalyptic number.

12012021002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12012021002020 is an abundant number, since it is smaller than the sum of its proper divisors (15153626495444).

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

12012021002020 is a wasteful number, since it uses less digits than its factorization.

12012021002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46200080799 (or 46200080797 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12012021002020 its reverse (2020012021021), we get a palindrome (14032033023041).

The spelling of 12012021002020 in words is "twelve trillion, twelve billion, twenty-one million, two thousand, twenty".