1001213003 has 4 divisors (see below), whose sum is σ = 1144243440. Its totient is φ = 858182568.

The previous prime is 1001212997. The next prime is 1001213027. The reversal of 1001213003 is 3003121001.

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 1001213003 - 2⁴ = 1001212987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001213053) 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, 71515208 + ... + 71515221.

It is an arithmetic number, because the mean of its divisors is an integer number (286060860).

Almost surely, 2^1001213003 is an apocalyptic number.

1001213003 is a deficient number, since it is larger than the sum of its proper divisors (143030437).

1001213003 is an equidigital number, since it uses as much as digits as its factorization.

1001213003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143030436.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1001213003 is about 31641.9500505263. The cubic root of 1001213003 is about 1000.4041709572.

Adding to 1001213003 its reverse (3003121001), we get a palindrome (4004334004).

The spelling of 1001213003 in words is "one billion, one million, two hundred thirteen thousand, three".