44212440421 has 4 divisors (see below), whose sum is σ = 44262854572. Its totient is φ = 44162026272.

The previous prime is 44212440409. The next prime is 44212440443. The reversal of 44212440421 is 12404421244.

It is a happy number.

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 35877663396 + 8334777025 = 189414^2 + 91295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44212440421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44212440421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44212440121) 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, 25205760 + ... + 25207513.

It is an arithmetic number, because the mean of its divisors is an integer number (11065713643).

Almost surely, 2^44212440421 is an apocalyptic number.

It is an amenable number.

44212440421 is a deficient number, since it is larger than the sum of its proper divisors (50414151).

44212440421 is an equidigital number, since it uses as much as digits as its factorization.

44212440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50414150.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 44212440421 its reverse (12404421244), we get a palindrome (56616861665).

The spelling of 44212440421 in words is "forty-four billion, two hundred twelve million, four hundred forty thousand, four hundred twenty-one".