11243212123 has 16 divisors (see below), whose sum is σ = 13985800416. Its totient is φ = 8879869440.

The previous prime is 11243212117. The next prime is 11243212147. The reversal of 11243212123 is 32121234211.

It is not a de Polignac number, because 11243212123 - 2¹³ = 11243203931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11243212094 and 11243212103.

It is not an unprimeable number, because it can be changed into a prime (11243212223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2310036 + ... + 2314897.

It is an arithmetic number, because the mean of its divisors is an integer number (874112526).

Almost surely, 2^11243212123 is an apocalyptic number.

11243212123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11243212123 is a deficient number, since it is larger than the sum of its proper divisors (2742588293).

11243212123 is a wasteful number, since it uses less digits than its factorization.

11243212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624974.

The product of its digits is 576, while the sum is 22.

Adding to 11243212123 its reverse (32121234211), we get a palindrome (43364446334).

The spelling of 11243212123 in words is "eleven billion, two hundred forty-three million, two hundred twelve thousand, one hundred twenty-three".