121500443 has 4 divisors (see below), whose sum is σ = 121575168. Its totient is φ = 121425720.

The previous prime is 121500389. The next prime is 121500461. The reversal of 121500443 is 344005121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121500443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121500473) 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, 34868 + ... + 38193.

It is an arithmetic number, because the mean of its divisors is an integer number (30393792).

Almost surely, 2^121500443 is an apocalyptic number.

121500443 is a deficient number, since it is larger than the sum of its proper divisors (74725).

121500443 is an equidigital number, since it uses as much as digits as its factorization.

121500443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74724.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 121500443 is about 11022.7239373941. The cubic root of 121500443 is about 495.2896892897.

Adding to 121500443 its reverse (344005121), we get a palindrome (465505564).

The spelling of 121500443 in words is "one hundred twenty-one million, five hundred thousand, four hundred forty-three".