221102102202100 has 144 divisors (see below), whose sum is σ = 553795806549888. Its totient is φ = 75052717608960.

The previous prime is 221102102202071. The next prime is 221102102202193. The reversal of 221102102202100 is 1202201201122.

It is a happy number.

It is a super-2 number, since 2×221102102202100² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70202784 + ... + 73284616.

It is an arithmetic number, because the mean of its divisors is an integer number (3845804212152).

Almost surely, 2^{221102102202100} is an apocalyptic number.

221102102202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221102102202100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276897903274944).

221102102202100 is an abundant number, since it is smaller than the sum of its proper divisors (332693704347788).

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

221102102202100 is a wasteful number, since it uses less digits than its factorization.

221102102202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082874 (or 3082867 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221102102202100 its reverse (1202201201122), we get a palindrome (222304303403222).

The spelling of 221102102202100 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred two million, two hundred two thousand, one hundred".