23201344221 has 16 divisors (see below), whose sum is σ = 34057024320. Its totient is φ = 13932414720.

The previous prime is 23201344219. The next prime is 23201344253. The reversal of 23201344221 is 12244310232.

It is a happy number.

It is not a de Polignac number, because 23201344221 - 2¹ = 23201344219 is a prime.

It is a super-2 number, since 2×23201344221² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23201344191 and 23201344200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23201344421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3221500 + ... + 3228693.

It is an arithmetic number, because the mean of its divisors is an integer number (2128564020).

Almost surely, 2^23201344221 is an apocalyptic number.

It is an amenable number.

23201344221 is a deficient number, since it is larger than the sum of its proper divisors (10855680099).

23201344221 is a wasteful number, since it uses less digits than its factorization.

23201344221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6450316.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 23201344221 its reverse (12244310232), we get a palindrome (35445654453).

The spelling of 23201344221 in words is "twenty-three billion, two hundred one million, three hundred forty-four thousand, two hundred twenty-one".