12121123 has 4 divisors (see below), whose sum is σ = 13852720. Its totient is φ = 10389528.

The previous prime is 12121121. The next prime is 12121133. The reversal of 12121123 is 32112121.

12121123 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32112121 = 607 ⋅52903.

It is a cyclic number.

It is not a de Polignac number, because 12121123 - 2¹ = 12121121 is a prime.

It is a super-2 number, since 2×12121123² = 293843245562258, which contains 22 as substring.

12121123 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12121121) 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, 865788 + ... + 865801.

It is an arithmetic number, because the mean of its divisors is an integer number (3463180).

Almost surely, 2^12121123 is an apocalyptic number.

12121123 is a deficient number, since it is larger than the sum of its proper divisors (1731597).

12121123 is an equidigital number, since it uses as much as digits as its factorization.

12121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731596.

The product of its digits is 24, while the sum is 13.

The square root of 12121123 is about 3481.5403200308. The cubic root of 12121123 is about 229.7105558758.

Adding to 12121123 its reverse (32112121), we get a palindrome (44233244).

The spelling of 12121123 in words is "twelve million, one hundred twenty-one thousand, one hundred twenty-three".