121340535255 has 24 divisors (see below), whose sum is σ = 213462757872. Its totient is φ = 63749055744.

The previous prime is 121340535187. The next prime is 121340535263. The reversal of 121340535255 is 552535043121.

121340535255 is a `hidden beast` number, since 1 + 213 + 40 + 5 + 352 + 55 = 666.

It is not a de Polignac number, because 121340535255 - 2¹² = 121340531159 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20119794 + ... + 20125823.

It is an arithmetic number, because the mean of its divisors is an integer number (8894281578).

Almost surely, 2^121340535255 is an apocalyptic number.

121340535255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121340535255 is a deficient number, since it is larger than the sum of its proper divisors (92122222617).

121340535255 is a wasteful number, since it uses less digits than its factorization.

121340535255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40245695 (or 40245692 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

Adding to 121340535255 its reverse (552535043121), we get a palindrome (673875578376).

The spelling of 121340535255 in words is "one hundred twenty-one billion, three hundred forty million, five hundred thirty-five thousand, two hundred fifty-five".