4444400221013 has 4 divisors (see below), whose sum is σ = 4462841715948. Its totient is φ = 4425958726080.

The previous prime is 4444400221007. The next prime is 4444400221081. The reversal of 4444400221013 is 3101220044444.

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 1344539968849 + 3099860252164 = 1159543^2 + 1760642^2 .

It is a cyclic number.

It is not a de Polignac number, because 4444400221013 - 2²² = 4444396026709 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 (4444400221813) 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, 9220747106 + ... + 9220747587.

It is an arithmetic number, because the mean of its divisors is an integer number (1115710428987).

Almost surely, 2^{4444400221013} is an apocalyptic number.

It is an amenable number.

4444400221013 is a deficient number, since it is larger than the sum of its proper divisors (18441494935).

4444400221013 is a wasteful number, since it uses less digits than its factorization.

4444400221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18441494934.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 4444400221013 its reverse (3101220044444), we get a palindrome (7545620265457).

The spelling of 4444400221013 in words is "four trillion, four hundred forty-four billion, four hundred million, two hundred twenty-one thousand, thirteen".