1121001003 has 24 divisors (see below), whose sum is σ = 1703473200. Its totient is φ = 709324224.

The previous prime is 1121001001. The next prime is 1121001023. The reversal of 1121001003 is 3001001211.

It is not a de Polignac number, because 1121001003 - 2¹ = 1121001001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1121001001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21000 + ... + 51797.

It is an arithmetic number, because the mean of its divisors is an integer number (70978050).

Almost surely, 2^1121001003 is an apocalyptic number.

1121001003 is a deficient number, since it is larger than the sum of its proper divisors (582472197).

1121001003 is a wasteful number, since it uses less digits than its factorization.

1121001003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72891 (or 72888 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1121001003 is about 33481.3530640564. The cubic root of 1121001003 is about 1038.8081152783.

Adding to 1121001003 its reverse (3001001211), we get a palindrome (4122002214).

The spelling of 1121001003 in words is "one billion, one hundred twenty-one million, one thousand, three".