221021201200100 has 72 divisors (see below), whose sum is σ = 548715080695488. Its totient is φ = 75698167363200.

The previous prime is 221021201200099. The next prime is 221021201200139. The reversal of 221021201200100 is 1002102120122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167112062 + ... + 168429461.

Almost surely, 2^{221021201200100} is an apocalyptic number.

221021201200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221021201200100 is an abundant number, since it is smaller than the sum of its proper divisors (327693879495388).

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

221021201200100 is a wasteful number, since it uses less digits than its factorization.

221021201200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335542485 (or 335542478 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221021201200100 its reverse (1002102120122), we get a palindrome (222023303320222).

The spelling of 221021201200100 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred one million, two hundred thousand, one hundred".