12011201022221 has 4 divisors (see below), whose sum is σ = 12398659119744. Its totient is φ = 11623742924700.

The previous prime is 12011201022199. The next prime is 12011201022229. The reversal of 12011201022221 is 12222010211021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12011201022221 - 2³⁰ = 12010127280397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12011201022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011201022229) 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 3 ways as a sum of consecutive naturals, for example, 193729048715 + ... + 193729048776.

It is an arithmetic number, because the mean of its divisors is an integer number (3099664779936).

Almost surely, 2^{12011201022221} is an apocalyptic number.

It is an amenable number.

12011201022221 is a deficient number, since it is larger than the sum of its proper divisors (387458097523).

12011201022221 is an equidigital number, since it uses as much as digits as its factorization.

12011201022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387458097522.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12011201022221 its reverse (12222010211021), we get a palindrome (24233211233242).

The spelling of 12011201022221 in words is "twelve trillion, eleven billion, two hundred one million, twenty-two thousand, two hundred twenty-one".