244212121 has 4 divisors (see below), whose sum is σ = 244291252. Its totient is φ = 244132992.

The previous prime is 244212109. The next prime is 244212127. The reversal of 244212121 is 121212442.

244212121 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.

It can be written as a sum of positive squares in 2 ways, for example, as 205635600 + 38576521 = 14340^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 244212121 - 2²⁷ = 109994393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244212127) 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, 34740 + ... + 41173.

It is an arithmetic number, because the mean of its divisors is an integer number (61072813).

Almost surely, 2^244212121 is an apocalyptic number.

It is an amenable number.

244212121 is a deficient number, since it is larger than the sum of its proper divisors (79131).

244212121 is an equidigital number, since it uses as much as digits as its factorization.

244212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79130.

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

The square root of 244212121 is about 15627.2877045251. The cubic root of 244212121 is about 625.0610039654.

Adding to 244212121 its reverse (121212442), we get a palindrome (365424563).

The spelling of 244212121 in words is "two hundred forty-four million, two hundred twelve thousand, one hundred twenty-one".