221000111210 has 32 divisors (see below), whose sum is σ = 421087645440. Its totient is φ = 83366837568.

The previous prime is 221000111083. The next prime is 221000111221. The reversal of 221000111210 is 12111000122.

It is a junction number, because it is equal to n+sod(n) for n = 221000111191 and 221000111200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8848802 + ... + 8873741.

It is an arithmetic number, because the mean of its divisors is an integer number (13158988920).

Almost surely, 2^221000111210 is an apocalyptic number.

221000111210 is a deficient number, since it is larger than the sum of its proper divisors (200087534230).

221000111210 is a wasteful number, since it uses less digits than its factorization.

221000111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17722622.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221000111210 its reverse (12111000122), we get a palindrome (233111111332).

The spelling of 221000111210 in words is "two hundred twenty-one billion, one hundred eleven thousand, two hundred ten".