2201112111221 has 16 divisors (see below), whose sum is σ = 2411484254208. Its totient is φ = 2000045779200.

The previous prime is 2201112111151. The next prime is 2201112111223. The reversal of 2201112111221 is 1221112111022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201112111221 is a prime.

It is a super-2 number, since 2×2201112111221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 2201112111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201112111223) 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, 4738565 + ... + 5182298.

It is an arithmetic number, because the mean of its divisors is an integer number (150717765888).

Almost surely, 2^{2201112111221} is an apocalyptic number.

It is an amenable number.

2201112111221 is a deficient number, since it is larger than the sum of its proper divisors (210372142987).

2201112111221 is a wasteful number, since it uses less digits than its factorization.

2201112111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9921332.

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

Adding to 2201112111221 its reverse (1221112111022), we get a palindrome (3422224222243).

It can be divided in two parts, 220111 and 2111221, that added together give a palindrome (2331332).

The spelling of 2201112111221 in words is "two trillion, two hundred one billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty-one".