321201221053 has 2 divisors, whose sum is σ = 321201221054. Its totient is φ = 321201221052.

The previous prime is 321201221023. The next prime is 321201221069. The reversal of 321201221053 is 350122102123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 314897178649 + 6304042404 = 561157^2 + 79398^2 .

It is a cyclic number.

It is not a de Polignac number, because 321201221053 - 2¹⁷ = 321201089981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321201221023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160600610526 + 160600610527.

It is an arithmetic number, because the mean of its divisors is an integer number (160600610527).

Almost surely, 2^321201221053 is an apocalyptic number.

It is an amenable number.

321201221053 is a deficient number, since it is larger than the sum of its proper divisors (1).

321201221053 is an equidigital number, since it uses as much as digits as its factorization.

321201221053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 321201221053 its reverse (350122102123), we get a palindrome (671323323176).

The spelling of 321201221053 in words is "three hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, fifty-three".