121340425215 has 16 divisors (see below), whose sum is σ = 200407412736. Its totient is φ = 62627316000.

The previous prime is 121340425189. The next prime is 121340425231. The reversal of 121340425215 is 512524043121.

It is not a de Polignac number, because 121340425215 - 2⁹ = 121340424703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130473111 + ... + 130474040.

It is an arithmetic number, because the mean of its divisors is an integer number (12525463296).

Almost surely, 2^121340425215 is an apocalyptic number.

121340425215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121340425215 is a deficient number, since it is larger than the sum of its proper divisors (79066987521).

121340425215 is a wasteful number, since it uses less digits than its factorization.

121340425215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260947190.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 121340425215 its reverse (512524043121), we get a palindrome (633864468336).

The spelling of 121340425215 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty-five thousand, two hundred fifteen".