11011012321 has 4 divisors (see below), whose sum is σ = 11052879552. Its totient is φ = 10969145092.

The previous prime is 11011012303. The next prime is 11011012427. The reversal of 11011012321 is 12321011011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11011012321 - 2²⁹ = 10474141409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011012301) 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, 20933221 + ... + 20933746.

It is an arithmetic number, because the mean of its divisors is an integer number (2763219888).

Almost surely, 2^11011012321 is an apocalyptic number.

It is an amenable number.

11011012321 is a deficient number, since it is larger than the sum of its proper divisors (41867231).

11011012321 is an equidigital number, since it uses as much as digits as its factorization.

11011012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41867230.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11011012321 its reverse (12321011011), we get a palindrome (23332023332).

The spelling of 11011012321 in words is "eleven billion, eleven million, twelve thousand, three hundred twenty-one".