2201120211221 has 4 divisors (see below), whose sum is σ = 2201268819852. Its totient is φ = 2200971602592.

The previous prime is 2201120211197. The next prime is 2201120211247. The reversal of 2201120211221 is 1221120211022.

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 305029767025 + 1896090444196 = 552295^2 + 1376986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201120211221 is a prime.

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 2201120211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201120211821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74282096 + ... + 74311721.

It is an arithmetic number, because the mean of its divisors is an integer number (550317204963).

Almost surely, 2^{2201120211221} is an apocalyptic number.

It is an amenable number.

2201120211221 is a deficient number, since it is larger than the sum of its proper divisors (148608631).

2201120211221 is a wasteful number, since it uses less digits than its factorization.

2201120211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148608630.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2201120211221 its reverse (1221120211022), we get a palindrome (3422240422243).

The spelling of 2201120211221 in words is "two trillion, two hundred one billion, one hundred twenty million, two hundred eleven thousand, two hundred twenty-one".