121121012203 has 4 divisors (see below), whose sum is σ = 121790189248. Its totient is φ = 120451835160.

The previous prime is 121121012141. The next prime is 121121012209. The reversal of 121121012203 is 302210121121.

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

It is a cyclic number.

It is not a de Polignac number, because 121121012203 - 2¹⁷ = 121120881131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121012209) 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, 334588251 + ... + 334588612.

It is an arithmetic number, because the mean of its divisors is an integer number (30447547312).

Almost surely, 2^121121012203 is an apocalyptic number.

121121012203 is a deficient number, since it is larger than the sum of its proper divisors (669177045).

121121012203 is an equidigital number, since it uses as much as digits as its factorization.

121121012203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669177044.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121121012203 its reverse (302210121121), we get a palindrome (423331133324).

The spelling of 121121012203 in words is "one hundred twenty-one billion, one hundred twenty-one million, twelve thousand, two hundred three".