12011020011221 has 32 divisors (see below), whose sum is σ = 15819830814720. Its totient is φ = 8834635137600.

The previous prime is 12011020011169. The next prime is 12011020011229. The reversal of 12011020011221 is 12211002011021.

It is a cyclic number.

It is not a de Polignac number, because 12011020011221 - 2¹⁴ = 12011019994837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011020011196 and 12011020011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011020011229) 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, 14413985 + ... + 15224486.

It is an arithmetic number, because the mean of its divisors is an integer number (494369712960).

Almost surely, 2^{12011020011221} is an apocalyptic number.

12011020011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011020011221 is a deficient number, since it is larger than the sum of its proper divisors (3808810803499).

12011020011221 is a wasteful number, since it uses less digits than its factorization.

12011020011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29638785.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12011020011221 its reverse (12211002011021), we get a palindrome (24222022022242).

The spelling of 12011020011221 in words is "twelve trillion, eleven billion, twenty million, eleven thousand, two hundred twenty-one".