323213012100221 has 2 divisors, whose sum is σ = 323213012100222. Its totient is φ = 323213012100220.

The previous prime is 323213012100179. The next prime is 323213012100257. The reversal of 323213012100221 is 122001210312323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263771055460900 + 59441956639321 = 16241030^2 + 7709861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323213012100221 is a prime.

It is a super-2 number, since 2×323213012100221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323213012120221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161606506050110 + 161606506050111.

It is an arithmetic number, because the mean of its divisors is an integer number (161606506050111).

Almost surely, 2^{323213012100221} is an apocalyptic number.

It is an amenable number.

323213012100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

323213012100221 is an equidigital number, since it uses as much as digits as its factorization.

323213012100221 is an evil number, because the sum of its binary digits is even.

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

Adding to 323213012100221 its reverse (122001210312323), we get a palindrome (445214222412544).

The spelling of 323213012100221 in words is "three hundred twenty-three trillion, two hundred thirteen billion, twelve million, one hundred thousand, two hundred twenty-one".