121217118255 has 12 divisors (see below), whose sum is σ = 210109671720. Its totient is φ = 64649129712.

The previous prime is 121217118229. The next prime is 121217118263. The reversal of 121217118255 is 552811712121.

It is not a de Polignac number, because 121217118255 - 2²³ = 121208729647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1346856825 + ... + 1346856914.

It is an arithmetic number, because the mean of its divisors is an integer number (17509139310).

Almost surely, 2^121217118255 is an apocalyptic number.

121217118255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121217118255 is a deficient number, since it is larger than the sum of its proper divisors (88892553465).

121217118255 is a wasteful number, since it uses less digits than its factorization.

121217118255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693713750 (or 2693713747 counting only the distinct ones).

The product of its digits is 11200, while the sum is 36.

The spelling of 121217118255 in words is "one hundred twenty-one billion, two hundred seventeen million, one hundred eighteen thousand, two hundred fifty-five".