1121002003 has 16 divisors (see below), whose sum is σ = 1231056000. Its totient is φ = 1012334400.

The previous prime is 1121001907. The next prime is 1121002039. The reversal of 1121002003 is 3002001211.

It is not a de Polignac number, because 1121002003 - 2¹⁷ = 1120870931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121002073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1816551 + ... + 1817167.

It is an arithmetic number, because the mean of its divisors is an integer number (76941000).

Almost surely, 2^1121002003 is an apocalyptic number.

1121002003 is a deficient number, since it is larger than the sum of its proper divisors (110053997).

1121002003 is a wasteful number, since it uses less digits than its factorization.

1121002003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1121002003 is about 33481.3679977387. The cubic root of 1121002003 is about 1038.8084241712.

Adding to 1121002003 its reverse (3002001211), we get a palindrome (4123003214).

The spelling of 1121002003 in words is "one billion, one hundred twenty-one million, two thousand, three".