12201210221111 has 4 divisors (see below), whose sum is σ = 12221511736224. Its totient is φ = 12180908706000.

The previous prime is 12201210221099. The next prime is 12201210221141. The reversal of 12201210221111 is 11112201210221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12201210221111 - 2⁴² = 7803163710007 is a prime.

It is a super-4 number, since 4×12201210221111⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12201210221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201210221141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10150756655 + ... + 10150757856.

It is an arithmetic number, because the mean of its divisors is an integer number (3055377934056).

Almost surely, 2^{12201210221111} is an apocalyptic number.

12201210221111 is a deficient number, since it is larger than the sum of its proper divisors (20301515113).

12201210221111 is an equidigital number, since it uses as much as digits as its factorization.

12201210221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20301515112.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12201210221111 its reverse (11112201210221), we get a palindrome (23313411431332).

It can be divided in two parts, 12201210221 and 111, that multiplied together give a palindrome (1354334334531).

The spelling of 12201210221111 in words is "twelve trillion, two hundred one billion, two hundred ten million, two hundred twenty-one thousand, one hundred eleven".