11001020321 has 4 divisors (see below), whose sum is σ = 11001670212. Its totient is φ = 11000370432.

The previous prime is 11001020287. The next prime is 11001020323. The reversal of 11001020321 is 12302010011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12302010011 = 5011 ⋅2455001.

It can be written as a sum of positive squares in 2 ways, for example, as 4220321296 + 6780699025 = 64964^2 + 82345^2 .

It is a cyclic number.

It is not a de Polignac number, because 11001020321 - 2⁶ = 11001020257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001020323) 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, 298856 + ... + 333641.

It is an arithmetic number, because the mean of its divisors is an integer number (2750417553).

Almost surely, 2^11001020321 is an apocalyptic number.

It is an amenable number.

11001020321 is a deficient number, since it is larger than the sum of its proper divisors (649891).

11001020321 is an equidigital number, since it uses as much as digits as its factorization.

11001020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649890.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 11001020321 its reverse (12302010011), we get a palindrome (23303030332).

The spelling of 11001020321 in words is "eleven billion, one million, twenty thousand, three hundred twenty-one".