1323011223221 has 4 divisors (see below), whose sum is σ = 1329937983744. Its totient is φ = 1316084462700.

The previous prime is 1323011223151. The next prime is 1323011223239. The reversal of 1323011223221 is 1223221103231.

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 1323011223221 - 2¹⁴ = 1323011206837 is a prime.

It is a super-2 number, since 2×1323011223221² (a number of 25 digits) contains 22 as substring.

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 (1323011228221) 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, 3463379975 + ... + 3463380356.

It is an arithmetic number, because the mean of its divisors is an integer number (332484495936).

Almost surely, 2^{1323011223221} is an apocalyptic number.

It is an amenable number.

1323011223221 is a deficient number, since it is larger than the sum of its proper divisors (6926760523).

1323011223221 is an equidigital number, since it uses as much as digits as its factorization.

1323011223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6926760522.

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

Adding to 1323011223221 its reverse (1223221103231), we get a palindrome (2546232326452).

The spelling of 1323011223221 in words is "one trillion, three hundred twenty-three billion, eleven million, two hundred twenty-three thousand, two hundred twenty-one".