11000021203 has 4 divisors (see below), whose sum is σ = 11000571120. Its totient is φ = 10999471288.

The previous prime is 11000021167. The next prime is 11000021209. The reversal of 11000021203 is 30212000011.

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 11000021203 - 2¹⁷ = 10999890131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11000021203.

It is not an unprimeable number, because it can be changed into a prime (11000021209) 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, 243775 + ... + 285352.

It is an arithmetic number, because the mean of its divisors is an integer number (2750142780).

Almost surely, 2^11000021203 is an apocalyptic number.

11000021203 is a deficient number, since it is larger than the sum of its proper divisors (549917).

11000021203 is an equidigital number, since it uses as much as digits as its factorization.

11000021203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549916.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 11000021203 its reverse (30212000011), we get a palindrome (41212021214).

The spelling of 11000021203 in words is "eleven billion, twenty-one thousand, two hundred three".