11211021003 has 96 divisors (see below), whose sum is σ = 19870583040. Its totient is φ = 5557144320.

The previous prime is 11211020987. The next prime is 11211021007. The reversal of 11211021003 is 30012011211.

It is not a de Polignac number, because 11211021003 - 2⁴ = 11211020987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11211021003.

It is not an unprimeable number, because it can be changed into a prime (11211021007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4755301 + ... + 4757657.

It is an arithmetic number, because the mean of its divisors is an integer number (206985240).

Almost surely, 2^11211021003 is an apocalyptic number.

11211021003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11211021003 is a deficient number, since it is larger than the sum of its proper divisors (8659562037).

11211021003 is a wasteful number, since it uses less digits than its factorization.

11211021003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2530 counting only the distinct ones).

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

Adding to 11211021003 its reverse (30012011211), we get a palindrome (41223032214).

The spelling of 11211021003 in words is "eleven billion, two hundred eleven million, twenty-one thousand, three".