12011000221221 has 8 divisors (see below), whose sum is σ = 16033353857664. Its totient is φ = 7997990032800.

The previous prime is 12011000221217. The next prime is 12011000221249. The reversal of 12011000221221 is 12212200011021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12011000221221 - 2² = 12011000221217 is a prime.

It is a super-4 number, since 4×12011000221221⁴ (a number of 53 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12011000221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011000221261) 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 7 ways as a sum of consecutive naturals, for example, 2335859005 + ... + 2335864146.

It is an arithmetic number, because the mean of its divisors is an integer number (2004169232208).

Almost surely, 2^{12011000221221} is an apocalyptic number.

It is an amenable number.

12011000221221 is a deficient number, since it is larger than the sum of its proper divisors (4022353636443).

12011000221221 is an equidigital number, since it uses as much as digits as its factorization.

12011000221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671724011.

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

Adding to 12011000221221 its reverse (12212200011021), we get a palindrome (24223200232242).

The spelling of 12011000221221 in words is "twelve trillion, eleven billion, two hundred twenty-one thousand, two hundred twenty-one".