22111011211 has 4 divisors (see below), whose sum is σ = 22112552800. Its totient is φ = 22109469624.

The previous prime is 22111011163. The next prime is 22111011233. The reversal of 22111011211 is 11211011122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11211011122 = 2 ⋅5605505561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111011211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22111011191 and 22111011200.

It is not an unprimeable number, because it can be changed into a prime (22111011311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749076 + ... + 778033.

It is an arithmetic number, because the mean of its divisors is an integer number (5528138200).

Almost surely, 2^22111011211 is an apocalyptic number.

22111011211 is a deficient number, since it is larger than the sum of its proper divisors (1541589).

22111011211 is a wasteful number, since it uses less digits than its factorization.

22111011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541588.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 22111011211 its reverse (11211011122), we get a palindrome (33322022333).

The spelling of 22111011211 in words is "twenty-two billion, one hundred eleven million, eleven thousand, two hundred eleven".