24040011221 has 12 divisors (see below), whose sum is σ = 24839535468. Its totient is φ = 23249221632.

The previous prime is 24040011211. The next prime is 24040011239. The reversal of 24040011221 is 12211004042.

It can be written as a sum of positive squares in 2 ways, for example, as 11965078225 + 12074932996 = 109385^2 + 109886^2 .

It is not a de Polignac number, because 24040011221 - 2⁶ = 24040011157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 24040011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24040011211) 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, 1020245 + ... + 1043541.

It is an arithmetic number, because the mean of its divisors is an integer number (2069961289).

Almost surely, 2^24040011221 is an apocalyptic number.

It is an amenable number.

24040011221 is a deficient number, since it is larger than the sum of its proper divisors (799524247).

24040011221 is an equidigital number, since it uses as much as digits as its factorization.

24040011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23668 (or 23501 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 24040011221 its reverse (12211004042), we get a palindrome (36251015263).

The spelling of 24040011221 in words is "twenty-four billion, forty million, eleven thousand, two hundred twenty-one".