121819344585 has 16 divisors (see below), whose sum is σ = 197580966144. Its totient is φ = 64080312192.

The previous prime is 121819344523. The next prime is 121819344599. The reversal of 121819344585 is 585443918121.

It is not a de Polignac number, because 121819344585 - 2¹⁰ = 121819343561 is a prime.

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, 55624177 + ... + 55626366.

It is an arithmetic number, because the mean of its divisors is an integer number (12348810384).

Almost surely, 2^121819344585 is an apocalyptic number.

121819344585 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121819344585 is a deficient number, since it is larger than the sum of its proper divisors (75761621559).

121819344585 is a wasteful number, since it uses less digits than its factorization.

121819344585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111250624.

The product of its digits is 1382400, while the sum is 51.

The spelling of 121819344585 in words is "one hundred twenty-one billion, eight hundred nineteen million, three hundred forty-four thousand, five hundred eighty-five".