12021203023 has 16 divisors (see below), whose sum is σ = 13182529536. Its totient is φ = 10927556640.

The previous prime is 12021203021. The next prime is 12021203039. The reversal of 12021203023 is 32030212021.

It is a cyclic number.

It is not a de Polignac number, because 12021203023 - 2¹ = 12021203021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021202988 and 12021203006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021203021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127663 + ... + 200848.

It is an arithmetic number, because the mean of its divisors is an integer number (823908096).

Almost surely, 2^12021203023 is an apocalyptic number.

12021203023 is a deficient number, since it is larger than the sum of its proper divisors (1161326513).

12021203023 is a wasteful number, since it uses less digits than its factorization.

12021203023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328614.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12021203023 its reverse (32030212021), we get a palindrome (44051415044).

The spelling of 12021203023 in words is "twelve billion, twenty-one million, two hundred three thousand, twenty-three".