221000111211 has 8 divisors (see below), whose sum is σ = 321454707264. Its totient is φ = 133939461320.

The previous prime is 221000111083. The next prime is 221000111221. The reversal of 221000111211 is 112111000122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221000111211 - 2⁷ = 221000111083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221000111221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3348486501 + ... + 3348486566.

It is an arithmetic number, because the mean of its divisors is an integer number (40181838408).

Almost surely, 2^221000111211 is an apocalyptic number.

221000111211 is a deficient number, since it is larger than the sum of its proper divisors (100454596053).

221000111211 is a wasteful number, since it uses less digits than its factorization.

221000111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6696973081.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221000111211 its reverse (112111000122), we get a palindrome (333111111333).

The spelling of 221000111211 in words is "two hundred twenty-one billion, one hundred eleven thousand, two hundred eleven".