4244123021 has 8 divisors (see below), whose sum is σ = 4266523800. Its totient is φ = 4221771840.

The previous prime is 4244123017. The next prime is 4244123027. The reversal of 4244123021 is 1203214424.

It can be written as a sum of positive squares in 4 ways, for example, as 762532996 + 3481590025 = 27614^2 + 59005^2 .

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 4244123021 - 2² = 4244123017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4244123027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165875 + ... + 189743.

It is an arithmetic number, because the mean of its divisors is an integer number (533315475).

Almost surely, 2^4244123021 is an apocalyptic number.

It is an amenable number.

4244123021 is a deficient number, since it is larger than the sum of its proper divisors (22400779).

4244123021 is a wasteful number, since it uses less digits than its factorization.

4244123021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24799.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4244123021 is about 65146.9340874918. The cubic root of 4244123021 is about 1619.0589236521.

Adding to 4244123021 its reverse (1203214424), we get a palindrome (5447337445).

The spelling of 4244123021 in words is "four billion, two hundred forty-four million, one hundred twenty-three thousand, twenty-one".