4451512201221 has 4 divisors (see below), whose sum is σ = 5935349601632. Its totient is φ = 2967674800812.

The previous prime is 4451512201217. The next prime is 4451512201223. The reversal of 4451512201221 is 1221022151544.

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 not a de Polignac number, because 4451512201221 - 2² = 4451512201217 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 (4451512201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 741918700201 + ... + 741918700206.

It is an arithmetic number, because the mean of its divisors is an integer number (1483837400408).

Almost surely, 2^{4451512201221} is an apocalyptic number.

It is an amenable number.

4451512201221 is a deficient number, since it is larger than the sum of its proper divisors (1483837400411).

4451512201221 is a wasteful number, since it uses less digits than its factorization.

4451512201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483837400410.

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 4451512201221 its reverse (1221022151544), we get a palindrome (5672534352765).

The spelling of 4451512201221 in words is "four trillion, four hundred fifty-one billion, five hundred twelve million, two hundred one thousand, two hundred twenty-one".