1203121112203 has 4 divisors (see below), whose sum is σ = 1203126860880. Its totient is φ = 1203115363528.

The previous prime is 1203121112197. The next prime is 1203121112243. The reversal of 1203121112203 is 3022111213021.

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 1203121112203 - 2²¹ = 1203119015051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1203121112243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2548063 + ... + 2983096.

It is an arithmetic number, because the mean of its divisors is an integer number (300781715220).

Almost surely, 2^{1203121112203} is an apocalyptic number.

1203121112203 is a deficient number, since it is larger than the sum of its proper divisors (5748677).

1203121112203 is an equidigital number, since it uses as much as digits as its factorization.

1203121112203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748676.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1203121112203 its reverse (3022111213021), we get a palindrome (4225232325224).

The spelling of 1203121112203 in words is "one trillion, two hundred three billion, one hundred twenty-one million, one hundred twelve thousand, two hundred three".