12021332123 has 8 divisors (see below), whose sum is σ = 12190439520. Its totient is φ = 11853146880.

The previous prime is 12021332047. The next prime is 12021332149. The reversal of 12021332123 is 32123312021.

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

It is a cyclic number.

It is not a de Polignac number, because 12021332123 - 2²⁰ = 12020283547 is a prime.

It is a super-2 number, since 2×12021332123² (a number of 21 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 = 12021332095 and 12021332104.

It is not an unprimeable number, because it can be changed into a prime (12021382123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204263 + ... + 256448.

It is an arithmetic number, because the mean of its divisors is an integer number (1523804940).

Almost surely, 2^12021332123 is an apocalyptic number.

12021332123 is a deficient number, since it is larger than the sum of its proper divisors (169107397).

12021332123 is an equidigital number, since it uses as much as digits as its factorization.

12021332123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461077.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12021332123 its reverse (32123312021), we get a palindrome (44144644144).

The spelling of 12021332123 in words is "twelve billion, twenty-one million, three hundred thirty-two thousand, one hundred twenty-three".