321222420293 has 2 divisors, whose sum is σ = 321222420294. Its totient is φ = 321222420292.

The previous prime is 321222420247. The next prime is 321222420371. The reversal of 321222420293 is 392024222123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239049611329 + 82172808964 = 488927^2 + 286658^2 .

It is a cyclic number.

It is not a de Polignac number, because 321222420293 - 2¹⁸ = 321222158149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321222420223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160611210146 + 160611210147.

It is an arithmetic number, because the mean of its divisors is an integer number (160611210147).

Almost surely, 2^321222420293 is an apocalyptic number.

It is an amenable number.

321222420293 is a deficient number, since it is larger than the sum of its proper divisors (1).

321222420293 is an equidigital number, since it uses as much as digits as its factorization.

321222420293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 321222420293 in words is "three hundred twenty-one billion, two hundred twenty-two million, four hundred twenty thousand, two hundred ninety-three".