44001213444221 has 6 divisors (see below), whose sum is σ = 48364970149566. Its totient is φ = 40001103131000.

The previous prime is 44001213444203. The next prime is 44001213444239. The reversal of 44001213444221 is 12244431210044.

It is an interprime number because it is at equal distance from previous prime (44001213444203) and next prime (44001213444239).

It can be written as a sum of positive squares in only one way, i.e., 33081063604996 + 10920149839225 = 5751614^2 + 3304565^2 .

It is not a de Polignac number, because 44001213444221 - 2¹⁰ = 44001213443197 is a prime.

It is a super-2 number, since 2×44001213444221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44001218444221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181823195930 + ... + 181823196171.

It is an arithmetic number, because the mean of its divisors is an integer number (8060828358261).

Almost surely, 2^{44001213444221} is an apocalyptic number.

It is an amenable number.

44001213444221 is a deficient number, since it is larger than the sum of its proper divisors (4363756705345).

44001213444221 is a wasteful number, since it uses less digits than its factorization.

44001213444221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363646392123 (or 363646392112 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 44001213444221 its reverse (12244431210044), we get a palindrome (56245644654265).

The spelling of 44001213444221 in words is "forty-four trillion, one billion, two hundred thirteen million, four hundred forty-four thousand, two hundred twenty-one".