111221010220211 has 4 divisors (see below), whose sum is σ = 111286472853000. Its totient is φ = 111155547587424.

The previous prime is 111221010220207. The next prime is 111221010220231. The reversal of 111221010220211 is 112022010122111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111221010220211 - 2² = 111221010220207 is a prime.

It is a super-2 number, since 2×111221010220211² (a number of 29 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 111221010220211.

It is not an unprimeable number, because it can be changed into a prime (111221010220231) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 32731313846 + ... + 32731317243.

It is an arithmetic number, because the mean of its divisors is an integer number (27821618213250).

Almost surely, 2^{111221010220211} is an apocalyptic number.

111221010220211 is a deficient number, since it is larger than the sum of its proper divisors (65462632789).

111221010220211 is an equidigital number, since it uses as much as digits as its factorization.

111221010220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65462632788.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111221010220211 its reverse (112022010122111), we get a palindrome (223243020342322).

The spelling of 111221010220211 in words is "one hundred eleven trillion, two hundred twenty-one billion, ten million, two hundred twenty thousand, two hundred eleven".