1121121203 has 4 divisors (see below), whose sum is σ = 1121864688. Its totient is φ = 1120377720.

The previous prime is 1121121103. The next prime is 1121121263. The reversal of 1121121203 is 3021211211.

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 1121121203 - 2¹⁸ = 1120859059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121121263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369476 + ... + 372497.

It is an arithmetic number, because the mean of its divisors is an integer number (280466172).

Almost surely, 2^1121121203 is an apocalyptic number.

1121121203 is a deficient number, since it is larger than the sum of its proper divisors (743485).

1121121203 is an equidigital number, since it uses as much as digits as its factorization.

1121121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743484.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1121121203 is about 33483.1480449494. The cubic root of 1121121203 is about 1038.8452428908.

Adding to 1121121203 its reverse (3021211211), we get a palindrome (4142332414).

The spelling of 1121121203 in words is "one billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred three".