221112220211 has 8 divisors (see below), whose sum is σ = 223168294800. Its totient is φ = 219056646240.

The previous prime is 221112220201. The next prime is 221112220237. The reversal of 221112220211 is 112022211122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221112220211 is a prime.

It is a super-2 number, since 2×221112220211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221112220211.

It is not an unprimeable number, because it can be changed into a prime (221112220201) 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, 793496 + ... + 1035306.

It is an arithmetic number, because the mean of its divisors is an integer number (27896036850).

Almost surely, 2^221112220211 is an apocalyptic number.

221112220211 is a deficient number, since it is larger than the sum of its proper divisors (2056074589).

221112220211 is a wasteful number, since it uses less digits than its factorization.

221112220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250309.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221112220211 its reverse (112022211122), we get a palindrome (333134431333).

The spelling of 221112220211 in words is "two hundred twenty-one billion, one hundred twelve million, two hundred twenty thousand, two hundred eleven".