12201222112221 has 16 divisors (see below), whose sum is σ = 16668794700800. Its totient is φ = 7934402574000.

The previous prime is 12201222112199. The next prime is 12201222112223. The reversal of 12201222112221 is 12221122210221.

It is not a de Polignac number, because 12201222112221 - 2²³ = 12201213723613 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 (12201222112223) 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, 62874571 + ... + 63068328.

It is an arithmetic number, because the mean of its divisors is an integer number (1041799668800).

Almost surely, 2^{12201222112221} is an apocalyptic number.

It is an amenable number.

12201222112221 is a deficient number, since it is larger than the sum of its proper divisors (4467572588579).

12201222112221 is a wasteful number, since it uses less digits than its factorization.

12201222112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125943696.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12201222112221 its reverse (12221122210221), we get a palindrome (24422344322442).

The spelling of 12201222112221 in words is "twelve trillion, two hundred one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".