11220123111 has 8 divisors (see below), whose sum is σ = 15128256240. Its totient is φ = 7396036032.

The previous prime is 11220123091. The next prime is 11220123121. The reversal of 11220123111 is 11132102211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11220123111 - 2¹⁰ = 11220122087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220123121) 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, 21011200 + ... + 21011733.

It is an arithmetic number, because the mean of its divisors is an integer number (1891032030).

Almost surely, 2^11220123111 is an apocalyptic number.

11220123111 is a deficient number, since it is larger than the sum of its proper divisors (3908133129).

11220123111 is an equidigital number, since it uses as much as digits as its factorization.

11220123111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42023025.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11220123111 its reverse (11132102211), we get a palindrome (22352225322).

The spelling of 11220123111 in words is "eleven billion, two hundred twenty million, one hundred twenty-three thousand, one hundred eleven".