240420040221 has 16 divisors (see below), whose sum is σ = 334629434880. Its totient is φ = 153250835760.

The previous prime is 240420040207. The next prime is 240420040297. The reversal of 240420040221 is 122040024042.

It is not a de Polignac number, because 240420040221 - 2³⁷ = 102981086749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240420047221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510975 + ... + 861356.

It is an arithmetic number, because the mean of its divisors is an integer number (20914339680).

Almost surely, 2^240420040221 is an apocalyptic number.

It is an amenable number.

240420040221 is a deficient number, since it is larger than the sum of its proper divisors (94209394659).

240420040221 is a wasteful number, since it uses less digits than its factorization.

240420040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374896.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 240420040221 its reverse (122040024042), we get a palindrome (362460064263).

The spelling of 240420040221 in words is "two hundred forty billion, four hundred twenty million, forty thousand, two hundred twenty-one".