12120002121123 has 32 divisors (see below), whose sum is σ = 19408639521600. Its totient is φ = 7430736158208.

The previous prime is 12120002121083. The next prime is 12120002121137. The reversal of 12120002121123 is 32112120002121.

It is not a de Polignac number, because 12120002121123 - 2¹⁰ = 12120002120099 is a prime.

It is a super-2 number, since 2×12120002121123² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12120002121096 and 12120002121105.

It is not an unprimeable number, because it can be changed into a prime (12120002121163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64087590 + ... + 64276427.

It is an arithmetic number, because the mean of its divisors is an integer number (606519985050).

Almost surely, 2^{12120002121123} is an apocalyptic number.

12120002121123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12120002121123 is a deficient number, since it is larger than the sum of its proper divisors (7288637400477).

12120002121123 is a wasteful number, since it uses less digits than its factorization.

12120002121123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128364308 (or 128364302 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12120002121123 its reverse (32112120002121), we get a palindrome (44232122123244).

The spelling of 12120002121123 in words is "twelve trillion, one hundred twenty billion, two million, one hundred twenty-one thousand, one hundred twenty-three".