4120242221 has 2 divisors, whose sum is σ = 4120242222. Its totient is φ = 4120242220.

The previous prime is 4120242211. The next prime is 4120242223. The reversal of 4120242221 is 1222420214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3947608900 + 172633321 = 62830^2 + 13139^2 .

It is a cyclic number.

It is not a de Polignac number, because 4120242221 - 2⁶ = 4120242157 is a prime.

It is a super-2 number, since 2×4120242221² = 33952791919422025682, which contains 22 as substring.

Together with 4120242223, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4120242193 and 4120242202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4120242223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2060121110 + 2060121111.

It is an arithmetic number, because the mean of its divisors is an integer number (2060121111).

Almost surely, 2^4120242221 is an apocalyptic number.

It is an amenable number.

4120242221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4120242221 is an equidigital number, since it uses as much as digits as its factorization.

4120242221 is an evil number, because the sum of its binary digits is even.

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

The square root of 4120242221 is about 64189.1129476019. The cubic root of 4120242221 is about 1603.1503322508.

Adding to 4120242221 its reverse (1222420214), we get a palindrome (5342662435).

The spelling of 4120242221 in words is "four billion, one hundred twenty million, two hundred forty-two thousand, two hundred twenty-one".