12021120123 has 8 divisors (see below), whose sum is σ = 16290917136. Its totient is φ = 7882701600.

The previous prime is 12021120113. The next prime is 12021120149. The reversal of 12021120123 is 32102112021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12021120123 - 2⁸ = 12021119867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021120113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32844408 + ... + 32844773.

It is an arithmetic number, because the mean of its divisors is an integer number (2036364642).

Almost surely, 2^12021120123 is an apocalyptic number.

12021120123 is a deficient number, since it is larger than the sum of its proper divisors (4269797013).

12021120123 is an equidigital number, since it uses as much as digits as its factorization.

12021120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65689245.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12021120123 its reverse (32102112021), we get a palindrome (44123232144).

The spelling of 12021120123 in words is "twelve billion, twenty-one million, one hundred twenty thousand, one hundred twenty-three".