23020231221 has 24 divisors (see below), whose sum is σ = 35815355576. Its totient is φ = 14163880320.

The previous prime is 23020231163. The next prime is 23020231243. The reversal of 23020231221 is 12213202032.

It can be written as a sum of positive squares in 4 ways, for example, as 7020764100 + 15999467121 = 83790^2 + 126489^2 .

It is not a de Polignac number, because 23020231221 - 2¹⁴ = 23020214837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23020231194 and 23020231203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23020231271) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 873051 + ... + 899031.

Almost surely, 2^23020231221 is an apocalyptic number.

It is an amenable number.

23020231221 is a deficient number, since it is larger than the sum of its proper divisors (12795124355).

23020231221 is a wasteful number, since it uses less digits than its factorization.

23020231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33573 (or 33570 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23020231221 its reverse (12213202032), we get a palindrome (35233433253).

The spelling of 23020231221 in words is "twenty-three billion, twenty million, two hundred thirty-one thousand, two hundred twenty-one".