12011021021020 has 144 divisors (see below), whose sum is σ = 30063180339360. Its totient is φ = 4016777318400.

The previous prime is 12011021020967. The next prime is 12011021021057. The reversal of 12011021021020 is 2012012011021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207741876 + ... + 207799684.

It is an arithmetic number, because the mean of its divisors is an integer number (208772085690).

Almost surely, 2^{12011021021020} is an apocalyptic number.

12011021021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12011021021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15031590169680).

12011021021020 is an abundant number, since it is smaller than the sum of its proper divisors (18052159318340).

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

12011021021020 is a wasteful number, since it uses less digits than its factorization.

12011021021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63044 (or 63035 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011021021020 its reverse (2012012011021), we get a palindrome (14023033032041).

Subtracting from 12011021021020 its reverse (2012012011021), we obtain a palindrome (9999009009999).

The spelling of 12011021021020 in words is "twelve trillion, eleven billion, twenty-one million, twenty-one thousand, twenty".