240004221221 has 4 divisors (see below), whose sum is σ = 240020994444. Its totient is φ = 239987448000.

The previous prime is 240004221211. The next prime is 240004221229. The reversal of 240004221221 is 122122400042.

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 74753028100 + 165251193121 = 273410^2 + 406511^2 .

It is a cyclic number.

It is not a de Polignac number, because 240004221221 - 2⁶ = 240004221157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240004221193 and 240004221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240004221229) 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, 8365130 + ... + 8393771.

It is an arithmetic number, because the mean of its divisors is an integer number (60005248611).

Almost surely, 2^240004221221 is an apocalyptic number.

It is an amenable number.

240004221221 is a deficient number, since it is larger than the sum of its proper divisors (16773223).

240004221221 is a wasteful number, since it uses less digits than its factorization.

240004221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16773222.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 240004221221 its reverse (122122400042), we get a palindrome (362126621263).

The spelling of 240004221221 in words is "two hundred forty billion, four million, two hundred twenty-one thousand, two hundred twenty-one".