121321135107 has 24 divisors (see below), whose sum is σ = 175850262224. Its totient is φ = 80600292864.

The previous prime is 121321135097. The next prime is 121321135213. The reversal of 121321135107 is 701531123121.

121321135107 is a `hidden beast` number, since 1 + 2 + 1 + 32 + 113 + 510 + 7 = 666.

It is not a de Polignac number, because 121321135107 - 2¹² = 121321131011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121321135907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3423423 + ... + 3458679.

Almost surely, 2^121321135107 is an apocalyptic number.

121321135107 is a deficient number, since it is larger than the sum of its proper divisors (54529127117).

121321135107 is a wasteful number, since it uses less digits than its factorization.

121321135107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36579 (or 36576 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

Adding to 121321135107 its reverse (701531123121), we get a palindrome (822852258228).

The spelling of 121321135107 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-five thousand, one hundred seven".