221120122211 has 8 divisors (see below), whose sum is σ = 242877937920. Its totient is φ = 200374297992.

The previous prime is 221120122199. The next prime is 221120122243. The reversal of 221120122211 is 112221021122.

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-221120122211 is a prime.

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 221120122211.

It is not an unprimeable number, because it can be changed into a prime (221120122511) 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, 252997415 + ... + 252998288.

It is an arithmetic number, because the mean of its divisors is an integer number (30359742240).

Almost surely, 2^221120122211 is an apocalyptic number.

221120122211 is a deficient number, since it is larger than the sum of its proper divisors (21757815709).

221120122211 is a wasteful number, since it uses less digits than its factorization.

221120122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505995745.

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

Adding to 221120122211 its reverse (112221021122), we get a palindrome (333341143333).

The spelling of 221120122211 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred twenty-two thousand, two hundred eleven".