121012320013203 has 4 divisors (see below), whose sum is σ = 161349760017608. Its totient is φ = 80674880008800.

The previous prime is 121012320013199. The next prime is 121012320013213. The reversal of 121012320013203 is 302310023210121.

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

It is not a de Polignac number, because 121012320013203 - 2² = 121012320013199 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 121012320013203.

It is not an unprimeable number, because it can be changed into a prime (121012320013213) 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, 20168720002198 + ... + 20168720002203.

It is an arithmetic number, because the mean of its divisors is an integer number (40337440004402).

Almost surely, 2^{121012320013203} is an apocalyptic number.

121012320013203 is a deficient number, since it is larger than the sum of its proper divisors (40337440004405).

121012320013203 is an equidigital number, since it uses as much as digits as its factorization.

121012320013203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40337440004404.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121012320013203 its reverse (302310023210121), we get a palindrome (423322343223324).

The spelling of 121012320013203 in words is "one hundred twenty-one trillion, twelve billion, three hundred twenty million, thirteen thousand, two hundred three".