210404042011321 has 2 divisors, whose sum is σ = 210404042011322. Its totient is φ = 210404042011320.

The previous prime is 210404042011313. The next prime is 210404042011327. The reversal of 210404042011321 is 123110240404012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149081658010000 + 61322384001321 = 12209900^2 + 7830861^2 .

It is a cyclic number.

It is not a de Polignac number, because 210404042011321 - 2³ = 210404042011313 is a prime.

It is not a weakly prime, because it can be changed into another prime (210404042011327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105202021005660 + 105202021005661.

It is an arithmetic number, because the mean of its divisors is an integer number (105202021005661).

Almost surely, 2^{210404042011321} is an apocalyptic number.

It is an amenable number.

210404042011321 is a deficient number, since it is larger than the sum of its proper divisors (1).

210404042011321 is an equidigital number, since it uses as much as digits as its factorization.

210404042011321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 210404042011321 its reverse (123110240404012), we get a palindrome (333514282415333).

The spelling of 210404042011321 in words is "two hundred ten trillion, four hundred four billion, forty-two million, eleven thousand, three hundred twenty-one".