4240421221 has 8 divisors (see below), whose sum is σ = 4339969920. Its totient is φ = 4140915072.

The previous prime is 4240421201. The next prime is 4240421249. The reversal of 4240421221 is 1221240424.

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 4240421221 - 2⁵ = 4240421189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4240421192 and 4240421201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240421201) 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, 287925 + ... + 302293.

It is an arithmetic number, because the mean of its divisors is an integer number (542496240).

Almost surely, 2^4240421221 is an apocalyptic number.

It is an amenable number.

4240421221 is a deficient number, since it is larger than the sum of its proper divisors (99548699).

4240421221 is a wasteful number, since it uses less digits than its factorization.

4240421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21275.

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

The square root of 4240421221 is about 65118.5167291148. The cubic root of 4240421221 is about 1618.5880626783.

Adding to 4240421221 its reverse (1221240424), we get a palindrome (5461661645).

The spelling of 4240421221 in words is "four billion, two hundred forty million, four hundred twenty-one thousand, two hundred twenty-one".