221100200121210 has 64 divisors (see below), whose sum is σ = 539363949569280. Its totient is φ = 57990866618880.

The previous prime is 221100200121193. The next prime is 221100200121287. The reversal of 221100200121210 is 12121002001122.

It is a super-2 number, since 2×221100200121210² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221100200121210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37813051 + ... + 43266929.

It is an arithmetic number, because the mean of its divisors is an integer number (8427561712020).

Almost surely, 2^{221100200121210} is an apocalyptic number.

221100200121210 is an abundant number, since it is smaller than the sum of its proper divisors (318263749448070).

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

221100200121210 is a wasteful number, since it uses less digits than its factorization.

221100200121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476103.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221100200121210 its reverse (12121002001122), we get a palindrome (233221202122332).

The spelling of 221100200121210 in words is "two hundred twenty-one trillion, one hundred billion, two hundred million, one hundred twenty-one thousand, two hundred ten".