11324311021 has 4 divisors (see below), whose sum is σ = 11351210044. Its totient is φ = 11297412000.

The previous prime is 11324311013. The next prime is 11324311079. The reversal of 11324311021 is 12011342311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12011342311 = 61 ⋅196907251.

It can be written as a sum of positive squares in 2 ways, for example, as 112466025 + 11211844996 = 10605^2 + 105886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11324311021 - 2³ = 11324311013 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 11324311021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11324311121) 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, 13448880 + ... + 13449721.

It is an arithmetic number, because the mean of its divisors is an integer number (2837802511).

Almost surely, 2^11324311021 is an apocalyptic number.

It is an amenable number.

11324311021 is a deficient number, since it is larger than the sum of its proper divisors (26899023).

11324311021 is an equidigital number, since it uses as much as digits as its factorization.

11324311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26899022.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11324311021 its reverse (12011342311), we get a palindrome (23335653332).

The spelling of 11324311021 in words is "eleven billion, three hundred twenty-four million, three hundred eleven thousand, twenty-one".