11323231021 has 8 divisors (see below), whose sum is σ = 12020944320. Its totient is φ = 10629033408.

The previous prime is 11323231009. The next prime is 11323231037. The reversal of 11323231021 is 12013232311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11323231021 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 11323231021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323231721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872281 + ... + 885166.

It is an arithmetic number, because the mean of its divisors is an integer number (1502618040).

Almost surely, 2^11323231021 is an apocalyptic number.

It is an amenable number.

11323231021 is a deficient number, since it is larger than the sum of its proper divisors (697713299).

11323231021 is a wasteful number, since it uses less digits than its factorization.

11323231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1757843.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11323231021 its reverse (12013232311), we get a palindrome (23336463332).

It can be divided in two parts, 1132 and 3231021, that added together give a triangular number (3232153 = T₂₅₄₂).

The spelling of 11323231021 in words is "eleven billion, three hundred twenty-three million, two hundred thirty-one thousand, twenty-one".