121513505219 has 2 divisors, whose sum is σ = 121513505220. Its totient is φ = 121513505218.

The previous prime is 121513505213. The next prime is 121513505227. The reversal of 121513505219 is 912505315121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121513505219 - 2⁸ = 121513504963 is a prime.

It is a super-2 number, since 2×121513505219² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121513505213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60756752609 + 60756752610.

It is an arithmetic number, because the mean of its divisors is an integer number (60756752610).

Almost surely, 2^121513505219 is an apocalyptic number.

121513505219 is a deficient number, since it is larger than the sum of its proper divisors (1).

121513505219 is an equidigital number, since it uses as much as digits as its factorization.

121513505219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 35.

The spelling of 121513505219 in words is "one hundred twenty-one billion, five hundred thirteen million, five hundred five thousand, two hundred nineteen".