11212013123 has 4 divisors (see below), whose sum is σ = 11212318488. Its totient is φ = 11211707760.

The previous prime is 11212013081. The next prime is 11212013149. The reversal of 11212013123 is 32131021211.

11212013123 is digitally balanced in base 2, 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: 32131021211 = 2143 ⋅14993477.

It is a cyclic number.

It is not a de Polignac number, because 11212013123 - 2¹⁴ = 11211996739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212013173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88658 + ... + 174023.

It is an arithmetic number, because the mean of its divisors is an integer number (2803079622).

Almost surely, 2^11212013123 is an apocalyptic number.

11212013123 is a deficient number, since it is larger than the sum of its proper divisors (305365).

11212013123 is an equidigital number, since it uses as much as digits as its factorization.

11212013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305364.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11212013123 its reverse (32131021211), we get a palindrome (43343034334).

The spelling of 11212013123 in words is "eleven billion, two hundred twelve million, thirteen thousand, one hundred twenty-three".