15120101209 has 2 divisors, whose sum is σ = 15120101210. Its totient is φ = 15120101208.

The previous prime is 15120101179. The next prime is 15120101221. The reversal of 15120101209 is 90210102151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11845057225 + 3275043984 = 108835^2 + 57228^2 .

It is a cyclic number.

It is not a de Polignac number, because 15120101209 - 2¹¹ = 15120099161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15120101209.

It is not a weakly prime, because it can be changed into another prime (15120101239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7560050604 + 7560050605.

It is an arithmetic number, because the mean of its divisors is an integer number (7560050605).

Almost surely, 2^15120101209 is an apocalyptic number.

It is an amenable number.

15120101209 is a deficient number, since it is larger than the sum of its proper divisors (1).

15120101209 is an equidigital number, since it uses as much as digits as its factorization.

15120101209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 22.

The spelling of 15120101209 in words is "fifteen billion, one hundred twenty million, one hundred one thousand, two hundred nine".