12021221023 has 16 divisors (see below), whose sum is σ = 14039438400. Its totient is φ = 10079387136.

The previous prime is 12021221021. The next prime is 12021221039. The reversal of 12021221023 is 32012212021.

It is a happy number.

12021221023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12021221023 - 2¹ = 12021221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021220988 and 12021221006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76953 + ... + 173101.

It is an arithmetic number, because the mean of its divisors is an integer number (877464900).

Almost surely, 2^12021221023 is an apocalyptic number.

12021221023 is a deficient number, since it is larger than the sum of its proper divisors (2018217377).

12021221023 is an equidigital number, since it uses as much as digits as its factorization.

12021221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96546.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12021221023 its reverse (32012212021), we get a palindrome (44033433044).

The spelling of 12021221023 in words is "twelve billion, twenty-one million, two hundred twenty-one thousand, twenty-three".