11212123 has 4 divisors (see below), whose sum is σ = 12074608. Its totient is φ = 10349640.

The previous prime is 11212081. The next prime is 11212127. The reversal of 11212123 is 32121211.

11212123 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32121211 = 17 ⋅1889483.

It is a cyclic number.

It is not a de Polignac number, because 11212123 - 2¹⁷ = 11081051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 862471 = 11212123 / (1 + 1 + 2 + 1 + 2 + 1 + 2 + 3).

It is not an unprimeable number, because it can be changed into a prime (11212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431223 + ... + 431248.

It is an arithmetic number, because the mean of its divisors is an integer number (3018652).

Almost surely, 2^11212123 is an apocalyptic number.

11212123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11212123 is a deficient number, since it is larger than the sum of its proper divisors (862485).

11212123 is an equidigital number, since it uses as much as digits as its factorization.

11212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862484.

The product of its digits is 24, while the sum is 13.

The square root of 11212123 is about 3348.4508358344. The cubic root of 11212123 is about 223.8184847009.

Adding to 11212123 its reverse (32121211), we get a palindrome (43333334).

The spelling of 11212123 in words is "eleven million, two hundred twelve thousand, one hundred twenty-three".