321203223301421 has 2 divisors, whose sum is σ = 321203223301422. Its totient is φ = 321203223301420.

The previous prime is 321203223301397. The next prime is 321203223301507. The reversal of 321203223301421 is 124103322302123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257075880019396 + 64127343282025 = 16033586^2 + 8007955^2 .

It is a cyclic number.

It is not a de Polignac number, because 321203223301421 - 2³⁴ = 321186043432237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321203223301621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160601611650710 + 160601611650711.

It is an arithmetic number, because the mean of its divisors is an integer number (160601611650711).

Almost surely, 2^{321203223301421} is an apocalyptic number.

It is an amenable number.

321203223301421 is a deficient number, since it is larger than the sum of its proper divisors (1).

321203223301421 is an equidigital number, since it uses as much as digits as its factorization.

321203223301421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 321203223301421 its reverse (124103322302123), we get a palindrome (445306545603544).

The spelling of 321203223301421 in words is "three hundred twenty-one trillion, two hundred three billion, two hundred twenty-three million, three hundred one thousand, four hundred twenty-one".