12011221120020 has 96 divisors (see below), whose sum is σ = 33678381574656. Its totient is φ = 3198520732800.

The previous prime is 12011221120007. The next prime is 12011221120033. The reversal of 12011221120020 is 2002112211021.

It is an interprime number because it is at equal distance from previous prime (12011221120007) and next prime (12011221120033).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 714477415 + ... + 714494225.

It is an arithmetic number, because the mean of its divisors is an integer number (350816474736).

Almost surely, 2^{12011221120020} is an apocalyptic number.

12011221120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011221120020 is an abundant number, since it is smaller than the sum of its proper divisors (21667160454636).

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

12011221120020 is a wasteful number, since it uses less digits than its factorization.

12011221120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32741 (or 32739 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12011221120020 its reverse (2002112211021), we get a palindrome (14013333331041).

The spelling of 12011221120020 in words is "twelve trillion, eleven billion, two hundred twenty-one million, one hundred twenty thousand, twenty".