2221311322121 has 16 divisors (see below), whose sum is σ = 2241432616320. Its totient is φ = 2201299269120.

The previous prime is 2221311322117. The next prime is 2221311322157. The reversal of 2221311322121 is 1212231131222.

It is a cyclic number.

It is not a de Polignac number, because 2221311322121 - 2² = 2221311322117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221311352121) 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, 50957291 + ... + 51000863.

It is an arithmetic number, because the mean of its divisors is an integer number (140089538520).

Almost surely, 2^{2221311322121} is an apocalyptic number.

It is an amenable number.

2221311322121 is a deficient number, since it is larger than the sum of its proper divisors (20121294199).

2221311322121 is a wasteful number, since it uses less digits than its factorization.

2221311322121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44816.

The product of its digits is 576, while the sum is 23.

Adding to 2221311322121 its reverse (1212231131222), we get a palindrome (3433542453343).

The spelling of 2221311322121 in words is "two trillion, two hundred twenty-one billion, three hundred eleven million, three hundred twenty-two thousand, one hundred twenty-one".