2201112212221 has 4 divisors (see below), whose sum is σ = 2370428536252. Its totient is φ = 2031795888192.

The previous prime is 2201112212209. The next prime is 2201112212227. The reversal of 2201112212221 is 1222122111022.

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

It can be written as a sum of positive squares in 2 ways, for example, as 583092596025 + 1618019616196 = 763605^2 + 1272014^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201112212221 - 2⁷ = 2201112212093 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 (2201112212227) 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, 84658161996 + ... + 84658162021.

It is an arithmetic number, because the mean of its divisors is an integer number (592607134063).

Almost surely, 2^{2201112212221} is an apocalyptic number.

It is an amenable number.

2201112212221 is a deficient number, since it is larger than the sum of its proper divisors (169316324031).

2201112212221 is a wasteful number, since it uses less digits than its factorization.

2201112212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169316324030.

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

Adding to 2201112212221 its reverse (1222122111022), we get a palindrome (3423234323243).

The spelling of 2201112212221 in words is "two trillion, two hundred one billion, one hundred twelve million, two hundred twelve thousand, two hundred twenty-one".