12011011101221 has 12 divisors (see below), whose sum is σ = 13181851968000. Its totient is φ = 10853716885560.

The previous prime is 12011011101203. The next prime is 12011011101223. The reversal of 12011011101221 is 12210111011021.

It is not a de Polignac number, because 12011011101221 - 2¹⁴ = 12011011084837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011011101196 and 12011011101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011011101223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19269221 + ... + 19882778.

It is an arithmetic number, because the mean of its divisors is an integer number (1098487664000).

Almost surely, 2^{12011011101221} is an apocalyptic number.

12011011101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12011011101221 is a deficient number, since it is larger than the sum of its proper divisors (1170840866779).

12011011101221 is an equidigital number, since it uses as much as digits as its factorization.

12011011101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39152344 (or 39152177 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12011011101221 its reverse (12210111011021), we get a palindrome (24221122112242).

The spelling of 12011011101221 in words is "twelve trillion, eleven billion, eleven million, one hundred one thousand, two hundred twenty-one".