12021221010023 has 4 divisors (see below), whose sum is σ = 12074177931000. Its totient is φ = 11968264089048.

The previous prime is 12021221009969. The next prime is 12021221010041. The reversal of 12021221010023 is 32001012212021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021221010023 - 2³² = 12016926042727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021221009983 and 12021221010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021221010053) 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, 26478460148 + ... + 26478460601.

It is an arithmetic number, because the mean of its divisors is an integer number (3018544482750).

Almost surely, 2^{12021221010023} is an apocalyptic number.

12021221010023 is a deficient number, since it is larger than the sum of its proper divisors (52956920977).

12021221010023 is an equidigital number, since it uses as much as digits as its factorization.

12021221010023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52956920976.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12021221010023 its reverse (32001012212021), we get a palindrome (44022233222044).

The spelling of 12021221010023 in words is "twelve trillion, twenty-one billion, two hundred twenty-one million, ten thousand, twenty-three".