4140240243221 has 4 divisors (see below), whose sum is σ = 4140305633772. Its totient is φ = 4140174852672.

The previous prime is 4140240243197. The next prime is 4140240243239. The reversal of 4140240243221 is 1223420420414.

It is a happy number.

4140240243221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1207275735121 + 2932964508100 = 1098761^2 + 1712590^2 .

It is a cyclic number.

It is not a de Polignac number, because 4140240243221 - 2¹⁸ = 4140239981077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4140240243241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32600210 + ... + 32726963.

It is an arithmetic number, because the mean of its divisors is an integer number (1035076408443).

Almost surely, 2^{4140240243221} is an apocalyptic number.

It is an amenable number.

4140240243221 is a deficient number, since it is larger than the sum of its proper divisors (65390551).

4140240243221 is an equidigital number, since it uses as much as digits as its factorization.

4140240243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65390550.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 4140240243221 its reverse (1223420420414), we get a palindrome (5363660663635).

The spelling of 4140240243221 in words is "four trillion, one hundred forty billion, two hundred forty million, two hundred forty-three thousand, two hundred twenty-one".