440100442125221 has 2 divisors, whose sum is σ = 440100442125222. Its totient is φ = 440100442125220.

The previous prime is 440100442125163. The next prime is 440100442125233. The reversal of 440100442125221 is 122521244001044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344285983953025 + 95814458172196 = 18554945^2 + 9788486^2 .

It is a cyclic number.

It is not a de Polignac number, because 440100442125221 - 2³⁰ = 440099368383397 is a prime.

It is a super-2 number, since 2×440100442125221² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440100442125241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220050221062610 + 220050221062611.

It is an arithmetic number, because the mean of its divisors is an integer number (220050221062611).

Almost surely, 2^{440100442125221} is an apocalyptic number.

It is an amenable number.

440100442125221 is a deficient number, since it is larger than the sum of its proper divisors (1).

440100442125221 is an equidigital number, since it uses as much as digits as its factorization.

440100442125221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20480, while the sum is 32.

Adding to 440100442125221 its reverse (122521244001044), we get a palindrome (562621686126265).

The spelling of 440100442125221 in words is "four hundred forty trillion, one hundred billion, four hundred forty-two million, one hundred twenty-five thousand, two hundred twenty-one".