12211101011 has 4 divisors (see below), whose sum is σ = 12212451552. Its totient is φ = 12209750472.

The previous prime is 12211100987. The next prime is 12211101043. The reversal of 12211101011 is 11010111221.

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 12211101011 - 2⁶ = 12211100947 is a prime.

It is a super-2 number, since 2×12211101011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12211100983 and 12211101001.

It is not an unprimeable number, because it can be changed into a prime (12211101611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661616 + ... + 679821.

It is an arithmetic number, because the mean of its divisors is an integer number (3053112888).

Almost surely, 2^12211101011 is an apocalyptic number.

12211101011 is a deficient number, since it is larger than the sum of its proper divisors (1350541).

12211101011 is an equidigital number, since it uses as much as digits as its factorization.

12211101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350540.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12211101011 its reverse (11010111221), we get a palindrome (23221212232).

It can be divided in two parts, 1221 and 1101011, that multiplied together give a palindrome (1344334431).

The spelling of 12211101011 in words is "twelve billion, two hundred eleven million, one hundred one thousand, eleven".