121530115315 has 32 divisors (see below), whose sum is σ = 172466841600. Its totient is φ = 82161122400.

The previous prime is 121530115309. The next prime is 121530115337. The reversal of 121530115315 is 513511035121.

It is not a de Polignac number, because 121530115315 - 2⁹ = 121530114803 is a prime.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 377271 + ... + 620800.

It is an arithmetic number, because the mean of its divisors is an integer number (5389588800).

Almost surely, 2^121530115315 is an apocalyptic number.

121530115315 is a deficient number, since it is larger than the sum of its proper divisors (50936726285).

121530115315 is an frugal number, since it uses more digits than its factorization.

121530115315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998168 (or 998154 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

The spelling of 121530115315 in words is "one hundred twenty-one billion, five hundred thirty million, one hundred fifteen thousand, three hundred fifteen".