63621705103221 has 8 divisors (see below), whose sum is σ = 84896318172960. Its totient is φ = 42380781051152.

The previous prime is 63621705103217. The next prime is 63621705103223. The reversal of 63621705103221 is 12230150712636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63621705103221 - 2² = 63621705103217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63621705103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63621705103223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8422250010 + ... + 8422257563.

It is an arithmetic number, because the mean of its divisors is an integer number (10612039771620).

Almost surely, 2^{63621705103221} is an apocalyptic number.

It is an amenable number.

63621705103221 is a deficient number, since it is larger than the sum of its proper divisors (21274613069739).

63621705103221 is a wasteful number, since it uses less digits than its factorization.

63621705103221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16844508835.

The product of its (nonzero) digits is 90720, while the sum is 39.

Adding to 63621705103221 its reverse (12230150712636), we get a palindrome (75851855815857).

The spelling of 63621705103221 in words is "sixty-three trillion, six hundred twenty-one billion, seven hundred five million, one hundred three thousand, two hundred twenty-one".