1323103122221 has 4 divisors (see below), whose sum is σ = 1329373753344. Its totient is φ = 1316832491100.

The previous prime is 1323103122203. The next prime is 1323103122223. The reversal of 1323103122221 is 1222213013231.

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 1323103122221 - 2²⁶ = 1323036013357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323103122223) 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, 3135315245 + ... + 3135315666.

It is an arithmetic number, because the mean of its divisors is an integer number (332343438336).

Almost surely, 2^{1323103122221} is an apocalyptic number.

It is an amenable number.

1323103122221 is a deficient number, since it is larger than the sum of its proper divisors (6270631123).

1323103122221 is an equidigital number, since it uses as much as digits as its factorization.

1323103122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6270631122.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1323103122221 its reverse (1222213013231), we get a palindrome (2545316135452).

The spelling of 1323103122221 in words is "one trillion, three hundred twenty-three billion, one hundred three million, one hundred twenty-two thousand, two hundred twenty-one".