4240221121 has 2 divisors, whose sum is σ = 4240221122. Its totient is φ = 4240221120.

The previous prime is 4240221119. The next prime is 4240221179. The reversal of 4240221121 is 1211220424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4187513521 + 52707600 = 64711^2 + 7260^2 .

It is a cyclic number.

It is not a de Polignac number, because 4240221121 - 2¹ = 4240221119 is a prime.

Together with 4240221119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4240221191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2120110560 + 2120110561.

It is an arithmetic number, because the mean of its divisors is an integer number (2120110561).

Almost surely, 2^4240221121 is an apocalyptic number.

It is an amenable number.

4240221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4240221121 is an equidigital number, since it uses as much as digits as its factorization.

4240221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 4240221121 is about 65116.9802816439. The cubic root of 4240221121 is about 1618.5626025846.

Adding to 4240221121 its reverse (1211220424), we get a palindrome (5451441545).

The spelling of 4240221121 in words is "four billion, two hundred forty million, two hundred twenty-one thousand, one hundred twenty-one".