11232311021 has 4 divisors (see below), whose sum is σ = 11232990912. Its totient is φ = 11231631132.

The previous prime is 11232310961. The next prime is 11232311023. The reversal of 11232311021 is 12011323211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12011323211 = 29 ⋅414183559.

It is a cyclic number.

It is not a de Polignac number, because 11232311021 - 2¹⁴ = 11232294637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11232311023) 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, 314531 + ... + 348416.

It is an arithmetic number, because the mean of its divisors is an integer number (2808247728).

Almost surely, 2^11232311021 is an apocalyptic number.

It is an amenable number.

11232311021 is a deficient number, since it is larger than the sum of its proper divisors (679891).

11232311021 is an equidigital number, since it uses as much as digits as its factorization.

11232311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679890.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11232311021 its reverse (12011323211), we get a palindrome (23243634232).

The spelling of 11232311021 in words is "eleven billion, two hundred thirty-two million, three hundred eleven thousand, twenty-one".