121500345023 has 4 divisors (see below), whose sum is σ = 128647424160. Its totient is φ = 114353265888.

The previous prime is 121500345011. The next prime is 121500345041. The reversal of 121500345023 is 320543005121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320543005121 = 227 ⋅1412083723.

It is a cyclic number.

It is not a de Polignac number, because 121500345023 - 2¹⁰ = 121500343999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121500344983 and 121500345001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121500345623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3573539543 + ... + 3573539576.

It is an arithmetic number, because the mean of its divisors is an integer number (32161856040).

Almost surely, 2^121500345023 is an apocalyptic number.

121500345023 is a deficient number, since it is larger than the sum of its proper divisors (7147079137).

121500345023 is an equidigital number, since it uses as much as digits as its factorization.

121500345023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7147079136.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 121500345023 in words is "one hundred twenty-one billion, five hundred million, three hundred forty-five thousand, twenty-three".