23031203021221 has 8 divisors (see below), whose sum is σ = 23268742971264. Its totient is φ = 22793665211520.

The previous prime is 23031203021179. The next prime is 23031203021237. The reversal of 23031203021221 is 12212030213032.

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

It is a cyclic number.

It is not a de Polignac number, because 23031203021221 - 2¹¹ = 23031203019173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23031203021192 and 23031203021201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031203021621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30086106 + ... + 30842116.

It is an arithmetic number, because the mean of its divisors is an integer number (2908592871408).

Almost surely, 2^{23031203021221} is an apocalyptic number.

It is an amenable number.

23031203021221 is a deficient number, since it is larger than the sum of its proper divisors (237539950043).

23031203021221 is an equidigital number, since it uses as much as digits as its factorization.

23031203021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070171.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 23031203021221 its reverse (12212030213032), we get a palindrome (35243233234253).

The spelling of 23031203021221 in words is "twenty-three trillion, thirty-one billion, two hundred three million, twenty-one thousand, two hundred twenty-one".