12111001123 has 8 divisors (see below), whose sum is σ = 13048738416. Its totient is φ = 11174138400.

The previous prime is 12111001103. The next prime is 12111001159. The reversal of 12111001123 is 32110011121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12111001123 - 2¹³ = 12110992931 is a prime.

It is a super-2 number, since 2×12111001123² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111001103) 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 7 ways as a sum of consecutive naturals, for example, 189733 + ... + 245398.

It is an arithmetic number, because the mean of its divisors is an integer number (1631092302).

Almost surely, 2^12111001123 is an apocalyptic number.

12111001123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12111001123 is a deficient number, since it is larger than the sum of its proper divisors (937737293).

12111001123 is a wasteful number, since it uses less digits than its factorization.

12111001123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437285.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12111001123 its reverse (32110011121), we get a palindrome (44221012244).

The spelling of 12111001123 in words is "twelve billion, one hundred eleven million, one thousand, one hundred twenty-three".