12123343011 has 16 divisors (see below), whose sum is σ = 17969423360. Its totient is φ = 7219856160.

The previous prime is 12123342983. The next prime is 12123343031. The reversal of 12123343011 is 11034332121.

It is not a de Polignac number, because 12123343011 - 2⁹ = 12123342499 is a prime.

It is a super-2 number, since 2×12123343011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12123343031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5012581 + ... + 5014998.

It is an arithmetic number, because the mean of its divisors is an integer number (1123088960).

Almost surely, 2^12123343011 is an apocalyptic number.

12123343011 is a deficient number, since it is larger than the sum of its proper divisors (5846080349).

12123343011 is a wasteful number, since it uses less digits than its factorization.

12123343011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10027626.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 12123343011 its reverse (11034332121), we get a palindrome (23157675132).

The spelling of 12123343011 in words is "twelve billion, one hundred twenty-three million, three hundred forty-three thousand, eleven".