12321121021123 has 4 divisors (see below), whose sum is σ = 12321694624888. Its totient is φ = 12320547417360.

The previous prime is 12321121021087. The next prime is 12321121021127. The reversal of 12321121021123 is 32112012112321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12321121021123 - 2¹⁷ = 12321120890051 is a prime.

It is a super-2 number, since 2×12321121021123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12321121021094 and 12321121021103.

It is not an unprimeable number, because it can be changed into a prime (12321121021127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286769661 + ... + 286812622.

It is an arithmetic number, because the mean of its divisors is an integer number (3080423656222).

Almost surely, 2^{12321121021123} is an apocalyptic number.

12321121021123 is a deficient number, since it is larger than the sum of its proper divisors (573603765).

12321121021123 is an equidigital number, since it uses as much as digits as its factorization.

12321121021123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573603764.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12321121021123 its reverse (32112012112321), we get a palindrome (44433133133444).

The spelling of 12321121021123 in words is "twelve trillion, three hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty-three".