44133221221 has 2 divisors, whose sum is σ = 44133221222. Its totient is φ = 44133221220.

The previous prime is 44133221191. The next prime is 44133221227. The reversal of 44133221221 is 12212233144.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38868122500 + 5265098721 = 197150^2 + 72561^2 .

It is a cyclic number.

It is not a de Polignac number, because 44133221221 - 2¹³ = 44133213029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44133221227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22066610610 + 22066610611.

It is an arithmetic number, because the mean of its divisors is an integer number (22066610611).

Almost surely, 2^44133221221 is an apocalyptic number.

It is an amenable number.

44133221221 is a deficient number, since it is larger than the sum of its proper divisors (1).

44133221221 is an equidigital number, since it uses as much as digits as its factorization.

44133221221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 25.

Adding to 44133221221 its reverse (12212233144), we get a palindrome (56345454365).

The spelling of 44133221221 in words is "forty-four billion, one hundred thirty-three million, two hundred twenty-one thousand, two hundred twenty-one".