23211233021 has 4 divisors (see below), whose sum is σ = 23345402172. Its totient is φ = 23077063872.

The previous prime is 23211232997. The next prime is 23211233041. The reversal of 23211233021 is 12033211232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9384765625 + 13826467396 = 96875^2 + 117586^2 .

It is a cyclic number.

It is not a de Polignac number, because 23211233021 - 2¹⁰ = 23211231997 is a prime.

It is a super-2 number, since 2×23211233021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23211232984 and 23211233002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211233041) 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, 67084316 + ... + 67084661.

It is an arithmetic number, because the mean of its divisors is an integer number (5836350543).

Almost surely, 2^23211233021 is an apocalyptic number.

It is an amenable number.

23211233021 is a deficient number, since it is larger than the sum of its proper divisors (134169151).

23211233021 is a wasteful number, since it uses less digits than its factorization.

23211233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134169150.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23211233021 its reverse (12033211232), we get a palindrome (35244444253).

The spelling of 23211233021 in words is "twenty-three billion, two hundred eleven million, two hundred thirty-three thousand, twenty-one".