12221201021221 has 8 divisors (see below), whose sum is σ = 12535729758720. Its totient is φ = 11908943249808.

The previous prime is 12221201021213. The next prime is 12221201021233. The reversal of 12221201021221 is 12212010212221.

12221201021221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12221201021221 - 2³ = 12221201021213 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 (12221201021021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567730621 + ... + 567752146.

It is an arithmetic number, because the mean of its divisors is an integer number (1566966219840).

Almost surely, 2^{12221201021221} is an apocalyptic number.

It is an amenable number.

12221201021221 is a deficient number, since it is larger than the sum of its proper divisors (314528737499).

12221201021221 is a wasteful number, since it uses less digits than its factorization.

12221201021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135483043.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221201021221 its reverse (12212010212221), we get a palindrome (24433211233442).

It can be divided in two parts, 1 and 2221201021221, that added together give a palindrome (2221201021222).

The spelling of 12221201021221 in words is "twelve trillion, two hundred twenty-one billion, two hundred one million, twenty-one thousand, two hundred twenty-one".