221210201202100 has 72 divisors (see below), whose sum is σ = 526590378871200. Its totient is φ = 79990687209600.

The previous prime is 221210201202061. The next prime is 221210201202113. The reversal of 221210201202100 is 1202102012122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 561535455 + ... + 561929254.

It is an arithmetic number, because the mean of its divisors is an integer number (7313755262100).

Almost surely, 2^{221210201202100} is an apocalyptic number.

221210201202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221210201202100 is an abundant number, since it is smaller than the sum of its proper divisors (305380177669100).

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

221210201202100 is a wasteful number, since it uses less digits than its factorization.

221210201202100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123464913 (or 1123464906 counting only the distinct ones).

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

Adding to 221210201202100 its reverse (1202102012122), we get a palindrome (222412303214222).

The spelling of 221210201202100 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred one million, two hundred two thousand, one hundred".