1323000213221 has 2 divisors, whose sum is σ = 1323000213222. Its totient is φ = 1323000213220.

The previous prime is 1323000213187. The next prime is 1323000213247. The reversal of 1323000213221 is 1223120003231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 916097836900 + 406902376321 = 957130^2 + 637889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323000213221 is a prime.

It is a super-2 number, since 2×1323000213221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1323000213193 and 1323000213202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323000213421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661500106610 + 661500106611.

It is an arithmetic number, because the mean of its divisors is an integer number (661500106611).

Almost surely, 2^{1323000213221} is an apocalyptic number.

It is an amenable number.

1323000213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323000213221 is an equidigital number, since it uses as much as digits as its factorization.

1323000213221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1323000213221 its reverse (1223120003231), we get a palindrome (2546120216452).

The spelling of 1323000213221 in words is "one trillion, three hundred twenty-three billion, two hundred thirteen thousand, two hundred twenty-one".