221210221201100 has 36 divisors (see below), whose sum is σ = 480027544776024. Its totient is φ = 88483836910080.

The previous prime is 221210221201093. The next prime is 221210221201157. The reversal of 221210221201100 is 1102122012122.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34438652 + ... + 40353948.

Almost surely, 2^{221210221201100} is an apocalyptic number.

221210221201100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210221201100 is an abundant number, since it is smaller than the sum of its proper divisors (258817323574924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221210221201100 is a wasteful number, since it uses less digits than its factorization.

221210221201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6289274 (or 6289267 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221210221201100 its reverse (1102122012122), we get a palindrome (222312343213222).

The spelling of 221210221201100 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty-one million, two hundred one thousand, one hundred".