22011003 has 12 divisors (see below), whose sum is σ = 36335728. Its totient is φ = 12577680.

The previous prime is 22011001. The next prime is 22011037. The reversal of 22011003 is 30011022.

It is a happy number.

It is not a de Polignac number, because 22011003 - 2¹ = 22011001 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22011001) 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 11 ways as a sum of consecutive naturals, for example, 174628 + ... + 174753.

Almost surely, 2^22011003 is an apocalyptic number.

22011003 is a deficient number, since it is larger than the sum of its proper divisors (14324725).

22011003 is a wasteful number, since it uses less digits than its factorization.

22011003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349394 (or 349391 counting only the distinct ones).

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

The square root of 22011003 is about 4691.5885369457. The cubic root of 22011003 is about 280.2506386721.

Adding to 22011003 its reverse (30011022), we get a palindrome (52022025).

The spelling of 22011003 in words is "twenty-two million, eleven thousand, three".