12221123311 has 4 divisors (see below), whose sum is σ = 12225461400. Its totient is φ = 12216785224.

The previous prime is 12221123269. The next prime is 12221123329. The reversal of 12221123311 is 11332112221.

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 12221123311 - 2¹³ = 12221115119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221123351) 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, 2164816 + ... + 2170453.

It is an arithmetic number, because the mean of its divisors is an integer number (3056365350).

Almost surely, 2^12221123311 is an apocalyptic number.

12221123311 is a deficient number, since it is larger than the sum of its proper divisors (4338089).

12221123311 is an equidigital number, since it uses as much as digits as its factorization.

12221123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338088.

The product of its digits is 144, while the sum is 19.

Adding to 12221123311 its reverse (11332112221), we get a palindrome (23553235532).

The spelling of 12221123311 in words is "twelve billion, two hundred twenty-one million, one hundred twenty-three thousand, three hundred eleven".