12123133444 has 12 divisors (see below), whose sum is σ = 21216613068. Its totient is φ = 6061244000.

The previous prime is 12123133357. The next prime is 12123133447. The reversal of 12123133444 is 44433132121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8965817344 + 3157316100 = 94688^2 + 56190^2 .

It is a super-2 number, since 2×12123133444² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12123133447) 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, 16974 + ... + 156634.

It is an arithmetic number, because the mean of its divisors is an integer number (1768051089).

Almost surely, 2^12123133444 is an apocalyptic number.

It is an amenable number.

12123133444 is a deficient number, since it is larger than the sum of its proper divisors (9093479624).

12123133444 is a wasteful number, since it uses less digits than its factorization.

12123133444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161366 (or 161364 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

Adding to 12123133444 its reverse (44433132121), we get a palindrome (56556265565).

The spelling of 12123133444 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-three thousand, four hundred forty-four".