20130310129109 has 2 divisors, whose sum is σ = 20130310129110. Its totient is φ = 20130310129108.

The previous prime is 20130310129087. The next prime is 20130310129169. The reversal of 20130310129109 is 90192101303102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19548972502084 + 581337627025 = 4421422^2 + 762455^2 .

It is a cyclic number.

It is not a de Polignac number, because 20130310129109 - 2¹⁶ = 20130310063573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20130310129169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065155064554 + 10065155064555.

It is an arithmetic number, because the mean of its divisors is an integer number (10065155064555).

Almost surely, 2^{20130310129109} is an apocalyptic number.

It is an amenable number.

20130310129109 is a deficient number, since it is larger than the sum of its proper divisors (1).

20130310129109 is an equidigital number, since it uses as much as digits as its factorization.

20130310129109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 32.

The spelling of 20130310129109 in words is "twenty trillion, one hundred thirty billion, three hundred ten million, one hundred twenty-nine thousand, one hundred nine".