2215663222321 has 4 divisors (see below), whose sum is σ = 2215675834992. Its totient is φ = 2215650609652.

The previous prime is 2215663222309. The next prime is 2215663222397. The reversal of 2215663222321 is 1232223665122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2215663222321 - 2¹⁷ = 2215663091249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2215663229321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6039055 + ... + 6395428.

It is an arithmetic number, because the mean of its divisors is an integer number (553918958748).

Almost surely, 2^{2215663222321} is an apocalyptic number.

It is an amenable number.

2215663222321 is a deficient number, since it is larger than the sum of its proper divisors (12612671).

2215663222321 is a wasteful number, since it uses less digits than its factorization.

2215663222321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12612670.

The product of its digits is 103680, while the sum is 37.

Adding to 2215663222321 its reverse (1232223665122), we get a palindrome (3447886887443).

The spelling of 2215663222321 in words is "two trillion, two hundred fifteen billion, six hundred sixty-three million, two hundred twenty-two thousand, three hundred twenty-one".