121506501010323 has 24 divisors (see below), whose sum is σ = 191773769773264. Its totient is φ = 67975664898240.

The previous prime is 121506501010303. The next prime is 121506501010327. The reversal of 121506501010323 is 323010105605121.

It is not a de Polignac number, because 121506501010323 - 2⁶ = 121506501010259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121506501010327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12874174240 + ... + 12874183677.

Almost surely, 2^{121506501010323} is an apocalyptic number.

121506501010323 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121506501010323 is a deficient number, since it is larger than the sum of its proper divisors (70267268762941).

121506501010323 is a wasteful number, since it uses less digits than its factorization.

121506501010323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25748357955 (or 25748357944 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

Adding to 121506501010323 its reverse (323010105605121), we get a palindrome (444516606615444).

The spelling of 121506501010323 in words is "one hundred twenty-one trillion, five hundred six billion, five hundred one million, ten thousand, three hundred twenty-three".