1001022003 has 16 divisors (see below), whose sum is σ = 1483896960. Its totient is φ = 666942408.

The previous prime is 1001021981. The next prime is 1001022007. The reversal of 1001022003 is 3002201001.

It is a happy number.

It is not a de Polignac number, because 1001022003 - 2¹⁴ = 1001005619 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 (1001022007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37876 + ... + 58622.

It is an arithmetic number, because the mean of its divisors is an integer number (92743560).

Almost surely, 2^1001022003 is an apocalyptic number.

1001022003 is a deficient number, since it is larger than the sum of its proper divisors (482874957).

1001022003 is a wasteful number, since it uses less digits than its factorization.

1001022003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22543 (or 22537 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1001022003 is about 31638.9317613601. The cubic root of 1001022003 is about 1000.3405516781.

Adding to 1001022003 its reverse (3002201001), we get a palindrome (4003223004).

The spelling of 1001022003 in words is "one billion, one million, twenty-two thousand, three".