121320032985 has 24 divisors (see below), whose sum is σ = 218076505920. Its totient is φ = 64704016944.

The previous prime is 121320032969. The next prime is 121320033041. The reversal of 121320032985 is 589230023121.

121320032985 is a `hidden beast` number, since 1 + 2 + 1 + 320 + 0 + 329 + 8 + 5 = 666.

It is not a de Polignac number, because 121320032985 - 2⁴ = 121320032969 is a prime.

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, 49924725 + ... + 49927154.

It is an arithmetic number, because the mean of its divisors is an integer number (9086521080).

Almost surely, 2^121320032985 is an apocalyptic number.

121320032985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121320032985 is a deficient number, since it is larger than the sum of its proper divisors (96756472935).

121320032985 is an frugal number, since it uses more digits than its factorization.

121320032985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99851899 (or 99851887 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 121320032985 in words is "one hundred twenty-one billion, three hundred twenty million, thirty-two thousand, nine hundred eighty-five".