40124240221 has 8 divisors (see below), whose sum is σ = 43212516984. Its totient is φ = 37036220160.

The previous prime is 40124240207. The next prime is 40124240227. The reversal of 40124240221 is 12204242104.

It can be written as a sum of positive squares in 4 ways, for example, as 10813088196 + 29311152025 = 103986^2 + 171205^2 .

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 40124240221 - 2¹⁷ = 40124109149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40124240192 and 40124240201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40124240227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368601 + ... + 464881.

It is an arithmetic number, because the mean of its divisors is an integer number (5401564623).

Almost surely, 2^40124240221 is an apocalyptic number.

It is an amenable number.

40124240221 is a deficient number, since it is larger than the sum of its proper divisors (3088276763).

40124240221 is a wasteful number, since it uses less digits than its factorization.

40124240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128351.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 40124240221 its reverse (12204242104), we get a palindrome (52328482325).

The spelling of 40124240221 in words is "forty billion, one hundred twenty-four million, two hundred forty thousand, two hundred twenty-one".