11223121003 has 4 divisors (see below), whose sum is σ = 11224271520. Its totient is φ = 11221970488.

The previous prime is 11223120977. The next prime is 11223121027. The reversal of 11223121003 is 30012132211.

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 11223121003 - 2²¹ = 11221023851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11223121043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560500 + ... + 580177.

It is an arithmetic number, because the mean of its divisors is an integer number (2806067880).

Almost surely, 2^11223121003 is an apocalyptic number.

11223121003 is a deficient number, since it is larger than the sum of its proper divisors (1150517).

11223121003 is an equidigital number, since it uses as much as digits as its factorization.

11223121003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150516.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11223121003 its reverse (30012132211), we get a palindrome (41235253214).

The spelling of 11223121003 in words is "eleven billion, two hundred twenty-three million, one hundred twenty-one thousand, three".