15412121009 has 2 divisors, whose sum is σ = 15412121010. Its totient is φ = 15412121008.

The previous prime is 15412120987. The next prime is 15412121051. The reversal of 15412121009 is 90012121451.

15412121009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13656259600 + 1755861409 = 116860^2 + 41903^2 .

It is a cyclic number.

It is not a de Polignac number, because 15412121009 - 2¹⁶ = 15412055473 is a prime.

It is not a weakly prime, because it can be changed into another prime (15412121609) 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, 7706060504 + 7706060505.

It is an arithmetic number, because the mean of its divisors is an integer number (7706060505).

Almost surely, 2^15412121009 is an apocalyptic number.

It is an amenable number.

15412121009 is a deficient number, since it is larger than the sum of its proper divisors (1).

15412121009 is an equidigital number, since it uses as much as digits as its factorization.

15412121009 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 26.

The spelling of 15412121009 in words is "fifteen billion, four hundred twelve million, one hundred twenty-one thousand, nine".