121505170245 has 16 divisors (see below), whose sum is σ = 194648598720. Its totient is φ = 64722648704.

The previous prime is 121505170229. The next prime is 121505170279. The reversal of 121505170245 is 542071505121.

It is a cyclic number.

It is not a de Polignac number, because 121505170245 - 2⁴ = 121505170229 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4994259 + ... + 5018528.

It is an arithmetic number, because the mean of its divisors is an integer number (12165537420).

Almost surely, 2^121505170245 is an apocalyptic number.

121505170245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121505170245 is a deficient number, since it is larger than the sum of its proper divisors (73143428475).

121505170245 is a wasteful number, since it uses less digits than its factorization.

121505170245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10013604.

The product of its (nonzero) digits is 14000, while the sum is 33.

Adding to 121505170245 its reverse (542071505121), we get a palindrome (663576675366).

The spelling of 121505170245 in words is "one hundred twenty-one billion, five hundred five million, one hundred seventy thousand, two hundred forty-five".