24135043221 has 12 divisors (see below), whose sum is σ = 34913538348. Its totient is φ = 16066116864.

The previous prime is 24135043181. The next prime is 24135043237. The reversal of 24135043221 is 12234053142.

It can be written as a sum of positive squares in 2 ways, for example, as 6382412100 + 17752631121 = 79890^2 + 133239^2 .

It is not a de Polignac number, because 24135043221 - 2¹⁷ = 24134912149 is a prime.

It is a super-2 number, since 2×24135043221² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24135043241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1986270 + ... + 1998383.

It is an arithmetic number, because the mean of its divisors is an integer number (2909461529).

Almost surely, 2^24135043221 is an apocalyptic number.

It is an amenable number.

24135043221 is a deficient number, since it is larger than the sum of its proper divisors (10778495127).

24135043221 is a wasteful number, since it uses less digits than its factorization.

24135043221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3985332 (or 3985329 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 24135043221 its reverse (12234053142), we get a palindrome (36369096363).

The spelling of 24135043221 in words is "twenty-four billion, one hundred thirty-five million, forty-three thousand, two hundred twenty-one".