2221312122321 has 16 divisors (see below), whose sum is σ = 3092083061760. Its totient is φ = 1415773042640.

The previous prime is 2221312122319. The next prime is 2221312122347. The reversal of 2221312122321 is 1232212131222.

It is not a de Polignac number, because 2221312122321 - 2¹ = 2221312122319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221312122291 and 2221312122300.

It is not an unprimeable number, because it can be changed into a prime (2221312122121) 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, 7997085 + ... + 8270186.

It is an arithmetic number, because the mean of its divisors is an integer number (193255191360).

Almost surely, 2^{2221312122321} is an apocalyptic number.

It is an amenable number.

2221312122321 is a deficient number, since it is larger than the sum of its proper divisors (870770939439).

2221312122321 is a wasteful number, since it uses less digits than its factorization.

2221312122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16269276.

The product of its digits is 1152, while the sum is 24.

Adding to 2221312122321 its reverse (1232212131222), we get a palindrome (3453524253543).

The spelling of 2221312122321 in words is "two trillion, two hundred twenty-one billion, three hundred twelve million, one hundred twenty-two thousand, three hundred twenty-one".