12211442011 has 4 divisors (see below), whose sum is σ = 12383434224. Its totient is φ = 12039449800.

The previous prime is 12211441997. The next prime is 12211442029. The reversal of 12211442011 is 11024411221.

It is a happy number.

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 12211442011 - 2⁷ = 12211441883 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 12211442011.

It is not an unprimeable number, because it can be changed into a prime (12211443011) 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, 85996000 + ... + 85996141.

It is an arithmetic number, because the mean of its divisors is an integer number (3095858556).

Almost surely, 2^12211442011 is an apocalyptic number.

12211442011 is a deficient number, since it is larger than the sum of its proper divisors (171992213).

12211442011 is an equidigital number, since it uses as much as digits as its factorization.

12211442011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171992212.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12211442011 its reverse (11024411221), we get a palindrome (23235853232).

The spelling of 12211442011 in words is "twelve billion, two hundred eleven million, four hundred forty-two thousand, eleven".