23211031321 has 4 divisors (see below), whose sum is σ = 23227007332. Its totient is φ = 23195055312.

The previous prime is 23211031307. The next prime is 23211031367. The reversal of 23211031321 is 12313011232.

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 20182180096 + 3028851225 = 142064^2 + 55035^2 .

It is a cyclic number.

It is not a de Polignac number, because 23211031321 - 2²³ = 23202642713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23211031381) 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, 7985826 + ... + 7988731.

It is an arithmetic number, because the mean of its divisors is an integer number (5806751833).

Almost surely, 2^23211031321 is an apocalyptic number.

It is an amenable number.

23211031321 is a deficient number, since it is larger than the sum of its proper divisors (15976011).

23211031321 is a wasteful number, since it uses less digits than its factorization.

23211031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15976010.

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

Adding to 23211031321 its reverse (12313011232), we get a palindrome (35524042553).

The spelling of 23211031321 in words is "twenty-three billion, two hundred eleven million, thirty-one thousand, three hundred twenty-one".