121599803 has 4 divisors (see below), whose sum is σ = 130953648. Its totient is φ = 112245960.

The previous prime is 121599769. The next prime is 121599851. The reversal of 121599803 is 308995121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308995121 = 14543 ⋅21247.

It is a cyclic number.

It is not a de Polignac number, because 121599803 - 2⁶ = 121599739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121599853) 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, 4676903 + ... + 4676928.

It is an arithmetic number, because the mean of its divisors is an integer number (32738412).

Almost surely, 2^121599803 is an apocalyptic number.

121599803 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121599803 is a deficient number, since it is larger than the sum of its proper divisors (9353845).

121599803 is an equidigital number, since it uses as much as digits as its factorization.

121599803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9353844.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 121599803 is about 11027.2300692422. The cubic root of 121599803 is about 495.4246643116.

The spelling of 121599803 in words is "one hundred twenty-one million, five hundred ninety-nine thousand, eight hundred three".