2442120221 has 8 divisors (see below), whose sum is σ = 2448276600. Its totient is φ = 2435973120.

The previous prime is 2442120181. The next prime is 2442120251. The reversal of 2442120221 is 1220212442.

2442120221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 196308121 + 2245812100 = 14011^2 + 47390^2 .

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 2442120221 - 2⁶ = 2442120157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2442120193 and 2442120202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2442120251) 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, 906845 + ... + 909533.

It is an arithmetic number, because the mean of its divisors is an integer number (306034575).

Almost surely, 2^2442120221 is an apocalyptic number.

It is an amenable number.

2442120221 is a deficient number, since it is larger than the sum of its proper divisors (6156379).

2442120221 is a wasteful number, since it uses less digits than its factorization.

2442120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4639.

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

The square root of 2442120221 is about 49417.8127905313. The cubic root of 2442120221 is about 1346.6529285420.

Adding to 2442120221 its reverse (1220212442), we get a palindrome (3662332663).

The spelling of 2442120221 in words is "two billion, four hundred forty-two million, one hundred twenty thousand, two hundred twenty-one".