121321030203 has 8 divisors (see below), whose sum is σ = 179734859600. Its totient is φ = 80880686784.

The previous prime is 121321030153. The next prime is 121321030211. The reversal of 121321030203 is 302030123121.

It is not a de Polignac number, because 121321030203 - 2²⁴ = 121304252987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121321030253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246685718 + ... + 2246685771.

It is an arithmetic number, because the mean of its divisors is an integer number (22466857450).

Almost surely, 2^121321030203 is an apocalyptic number.

121321030203 is a deficient number, since it is larger than the sum of its proper divisors (58413829397).

121321030203 is an equidigital number, since it uses as much as digits as its factorization.

121321030203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4493371498 (or 4493371492 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 121321030203 its reverse (302030123121), we get a palindrome (423351153324).

The spelling of 121321030203 in words is "one hundred twenty-one billion, three hundred twenty-one million, thirty thousand, two hundred three".