41221320221 has 4 divisors (see below), whose sum is σ = 41336143200. Its totient is φ = 41106497244.

The previous prime is 41221320209. The next prime is 41221320223. The reversal of 41221320221 is 12202312214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41221320221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 41221320193 and 41221320202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41221320223) 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, 57410951 + ... + 57411668.

It is an arithmetic number, because the mean of its divisors is an integer number (10334035800).

Almost surely, 2^41221320221 is an apocalyptic number.

It is an amenable number.

41221320221 is a deficient number, since it is larger than the sum of its proper divisors (114822979).

41221320221 is a wasteful number, since it uses less digits than its factorization.

41221320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114822978.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 41221320221 its reverse (12202312214), we get a palindrome (53423632435).

The spelling of 41221320221 in words is "forty-one billion, two hundred twenty-one million, three hundred twenty thousand, two hundred twenty-one".