121545023 has 4 divisors (see below), whose sum is σ = 121615200. Its totient is φ = 121474848.

The previous prime is 121545013. The next prime is 121545029. The reversal of 121545023 is 320545121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320545121 = 13 ⋅24657317.

It is a cyclic number.

It is not a de Polignac number, because 121545023 - 2⁴ = 121545007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121545023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121545029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32423 + ... + 35976.

It is an arithmetic number, because the mean of its divisors is an integer number (30403800).

Almost surely, 2^121545023 is an apocalyptic number.

121545023 is a deficient number, since it is larger than the sum of its proper divisors (70177).

121545023 is an equidigital number, since it uses as much as digits as its factorization.

121545023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70176.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 121545023 is about 11024.7459381158. The cubic root of 121545023 is about 495.3502578328.

The spelling of 121545023 in words is "one hundred twenty-one million, five hundred forty-five thousand, twenty-three".