2221231202321 has 4 divisors (see below), whose sum is σ = 2223970082544. Its totient is φ = 2218492322100.

The previous prime is 2221231202273. The next prime is 2221231202329. The reversal of 2221231202321 is 1232021321222.

It is a happy number.

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 2221231202321 - 2¹⁸ = 2221230940177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221231202329) 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, 1369438895 + ... + 1369440516.

It is an arithmetic number, because the mean of its divisors is an integer number (555992520636).

Almost surely, 2^{2221231202321} is an apocalyptic number.

It is an amenable number.

2221231202321 is a deficient number, since it is larger than the sum of its proper divisors (2738880223).

2221231202321 is an equidigital number, since it uses as much as digits as its factorization.

2221231202321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738880222.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 2221231202321 its reverse (1232021321222), we get a palindrome (3453252523543).

The spelling of 2221231202321 in words is "two trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred two thousand, three hundred twenty-one".