121235053515 has 32 divisors (see below), whose sum is σ = 196848838656. Its totient is φ = 63702414720.

The previous prime is 121235053447. The next prime is 121235053543. The reversal of 121235053515 is 515350532121.

It is a happy number.

It is not a de Polignac number, because 121235053515 - 2⁸ = 121235053259 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, 1475497 + ... + 1555493.

It is an arithmetic number, because the mean of its divisors is an integer number (6151526208).

Almost surely, 2^121235053515 is an apocalyptic number.

121235053515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121235053515 is a deficient number, since it is larger than the sum of its proper divisors (75613785141).

121235053515 is a wasteful number, since it uses less digits than its factorization.

121235053515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81499.

The product of its (nonzero) digits is 22500, while the sum is 33.

Adding to 121235053515 its reverse (515350532121), we get a palindrome (636585585636).

The spelling of 121235053515 in words is "one hundred twenty-one billion, two hundred thirty-five million, fifty-three thousand, five hundred fifteen".