12011000021221 has 16 divisors (see below), whose sum is σ = 13270672050048. Its totient is φ = 10812803584000.

The previous prime is 12011000021213. The next prime is 12011000021233. The reversal of 12011000021221 is 12212000011021.

12011000021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12011000021221 - 2³ = 12011000021213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011000021201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29703246 + ... + 30104896.

It is an arithmetic number, because the mean of its divisors is an integer number (829417003128).

Almost surely, 2^{12011000021221} is an apocalyptic number.

It is an amenable number.

12011000021221 is a deficient number, since it is larger than the sum of its proper divisors (1259672028827).

12011000021221 is a wasteful number, since it uses less digits than its factorization.

12011000021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478172.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12011000021221 its reverse (12212000011021), we get a palindrome (24223000032242).

The spelling of 12011000021221 in words is "twelve trillion, eleven billion, twenty-one thousand, two hundred twenty-one".