210231321109 has 2 divisors, whose sum is σ = 210231321110. Its totient is φ = 210231321108.

The previous prime is 210231321101. The next prime is 210231321127. The reversal of 210231321109 is 901123132012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147191159025 + 63040162084 = 383655^2 + 251078^2 .

It is a cyclic number.

It is not a de Polignac number, because 210231321109 - 2³ = 210231321101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210231321101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105115660554 + 105115660555.

It is an arithmetic number, because the mean of its divisors is an integer number (105115660555).

Almost surely, 2^210231321109 is an apocalyptic number.

It is an amenable number.

210231321109 is a deficient number, since it is larger than the sum of its proper divisors (1).

210231321109 is an equidigital number, since it uses as much as digits as its factorization.

210231321109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 210231321109 in words is "two hundred ten billion, two hundred thirty-one million, three hundred twenty-one thousand, one hundred nine".