12201110212221 has 24 divisors (see below), whose sum is σ = 21026856603840. Its totient is φ = 6972062977656.

The previous prime is 12201110212153. The next prime is 12201110212267. The reversal of 12201110212221 is 12221201110221.

12201110212221 is a `hidden beast` number, since 1 + 220 + 1 + 1 + 10 + 212 + 221 = 666.

It is not a de Polignac number, because 12201110212221 - 2¹³ = 12201110204029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12201110212194 and 12201110212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201110212271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4611151441 + ... + 4611154086.

It is an arithmetic number, because the mean of its divisors is an integer number (876119025160).

Almost surely, 2^{12201110212221} is an apocalyptic number.

It is an amenable number.

12201110212221 is a deficient number, since it is larger than the sum of its proper divisors (8825746391619).

12201110212221 is an equidigital number, since it uses as much as digits as its factorization.

12201110212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9222305550 (or 9222305537 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12201110212221 its reverse (12221201110221), we get a palindrome (24422311322442).

The spelling of 12201110212221 in words is "twelve trillion, two hundred one billion, one hundred ten million, two hundred twelve thousand, two hundred twenty-one".