121500430415 has 64 divisors (see below), whose sum is σ = 183971859456. Its totient is φ = 74973330432.

The previous prime is 121500430409. The next prime is 121500430417. The reversal of 121500430415 is 514034005121.

It is not a de Polignac number, because 121500430415 - 2⁴ = 121500430399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121500430417) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10696379 + ... + 10707731.

It is an arithmetic number, because the mean of its divisors is an integer number (2874560304).

Almost surely, 2^121500430415 is an apocalyptic number.

121500430415 is a deficient number, since it is larger than the sum of its proper divisors (62471429041).

121500430415 is a wasteful number, since it uses less digits than its factorization.

121500430415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11968.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 121500430415 its reverse (514034005121), we get a palindrome (635534435536).

The spelling of 121500430415 in words is "one hundred twenty-one billion, five hundred million, four hundred thirty thousand, four hundred fifteen".