111211000221 has 16 divisors (see below), whose sum is σ = 148560650240. Its totient is φ = 74001075120.

The previous prime is 111211000193. The next prime is 111211000259. The reversal of 111211000221 is 122000112111.

It is not a de Polignac number, because 111211000221 - 2⁶ = 111211000157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111211000197 and 111211000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211000721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10993956 + ... + 11004066.

It is an arithmetic number, because the mean of its divisors is an integer number (9285040640).

Almost surely, 2^111211000221 is an apocalyptic number.

It is an amenable number.

111211000221 is a deficient number, since it is larger than the sum of its proper divisors (37349650019).

111211000221 is a wasteful number, since it uses less digits than its factorization.

111211000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16656.

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

Adding to 111211000221 its reverse (122000112111), we get a palindrome (233211112332).

The spelling of 111211000221 in words is "one hundred eleven billion, two hundred eleven million, two hundred twenty-one", and thus it is an aban number.