244402121 has 4 divisors (see below), whose sum is σ = 244449744. Its totient is φ = 244354500.

The previous prime is 244402097. The next prime is 244402139. The reversal of 244402121 is 121204442.

244402121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121204442 = 2 ⋅60602221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244402121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 244402093 and 244402102.

It is not an unprimeable number, because it can be changed into a prime (244402181) 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, 15035 + ... + 26736.

It is an arithmetic number, because the mean of its divisors is an integer number (61112436).

Almost surely, 2^244402121 is an apocalyptic number.

It is an amenable number.

244402121 is a deficient number, since it is larger than the sum of its proper divisors (47623).

244402121 is an equidigital number, since it uses as much as digits as its factorization.

244402121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47622.

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

The square root of 244402121 is about 15633.3656325182. The cubic root of 244402121 is about 625.2230636320.

Adding to 244402121 its reverse (121204442), we get a palindrome (365606563).

The spelling of 244402121 in words is "two hundred forty-four million, four hundred two thousand, one hundred twenty-one".